diff --git a/src/state/news/index.ts b/src/state/news/index.ts
index 02ef131..aefeccb 100644
--- a/src/state/news/index.ts
+++ b/src/state/news/index.ts
@@ -2,11 +2,14 @@ import { Observable } from '../../utils/observable';
 import { IArticle, INewsState } from './types';
 
 export class NewsState extends Observable implements INewsState {
+    private articles: IArticle[] = [];
+
     public getArticles() {
-        return [];
+        return this.articles;
     }
 
     public setArticles(articles: IArticle[]) {
-        throw new Error('Not implemented');
+        this.articles = articles;
+        this.notifyObservers();
     }
 }
diff --git a/src/state/weather/index.ts b/src/state/weather/index.ts
index 2ac4584..3377879 100644
--- a/src/state/weather/index.ts
+++ b/src/state/weather/index.ts
@@ -2,11 +2,14 @@ import { IMeasurement, IWeatherState } from './types';
 import { Observable } from '../../utils/observable';
 
 export class WeatherState extends Observable implements IWeatherState {
+    private measurements: IMeasurement[] = [];
+
     public getMeasurements() {
-        return [];
+        return this.measurements;
     }
 
     public setMeasurements(measurements: IMeasurement[]) {
-        throw new Error('Not implemented');
+        this.measurements = measurements;
+        this.notifyObservers();
     }
 }
diff --git a/src/utils/observable/index.ts b/src/utils/observable/index.ts
index 022cdb8..292c067 100644
--- a/src/utils/observable/index.ts
+++ b/src/utils/observable/index.ts
@@ -1,15 +1,18 @@
 import { IObservable, IObserver } from './types';
 
 export class Observable implements IObservable {
+    private observers: IObserver[] = [];
     public addObserver(observer: IObserver) {
-        throw new Error('Not implemented');
+        this.observers.push(observer);
     }
 
     public deleteObserver(observer: IObserver) {
-        throw new Error('Not implemented');
+        this.observers = this.observers.filter(element => element !== observer);
     }
 
     public notifyObservers() {
-        throw new Error('Not implemented');
+        this.observers.forEach(element => {
+            element.update(this);
+        });
     }
 }
diff --git a/src/views/desktop.ts b/src/views/desktop.ts
index 98c881d..6ac01c9 100644
--- a/src/views/desktop.ts
+++ b/src/views/desktop.ts
@@ -1,12 +1,33 @@
 import { IObservable, IObserver } from '../utils/observable/types';
 import { IView } from './types';
+import { NewsState } from '../state/news';
+import { WeatherState } from '../state/weather';
+import { IArticle } from '../state/news/types';
+import { IMeasurement } from '../state/weather/types';
 
 export class DesktopView implements IObserver, IView {
+    private articles: IArticle[] = [];
+    private weathers: IMeasurement[] = [];
     public update(observable: IObservable) {
-        throw new Error('Not implemented');
+        if (observable instanceof NewsState) {
+            this.articles = observable.getArticles().slice(-3);
+        }
+        if (observable instanceof WeatherState) {
+            this.weathers = observable.getMeasurements().slice(-2);
+        }
+        this.render();
     }
 
     public render() {
-        throw new Error('Not implemented');
+        let answer = '<div class="desktop">\n';
+        this.articles.forEach(element => {
+            answer = `${answer}[${element.time}] ${element.category} - ${element.title}\n`;
+        });
+        this.weathers.forEach(element => {
+            answer = `${answer}[${element.time}] ${element.temperature} C, ${element.pressure} P, ${
+                element.humidity
+            } U\n`;
+        });
+        console.log(`${answer}</div>`);
     }
 }
diff --git a/src/views/mobile.ts b/src/views/mobile.ts
index 02a2ba5..f085d14 100644
--- a/src/views/mobile.ts
+++ b/src/views/mobile.ts
@@ -1,12 +1,37 @@
 import { IObservable, IObserver } from '../utils/observable/types';
 import { IView } from './types';
+import { NewsState } from '../state/news';
+import { WeatherState } from '../state/weather';
+import { IArticle } from '../state/news/types';
+import { IMeasurement } from '../state/weather/types';
 
 export class MobileView implements IObserver, IView {
+    private articles: IArticle[] = [];
+    private weathers: IMeasurement[] = [];
     public update(observable: IObservable) {
-        throw new Error('Not implemented');
+        if (observable instanceof NewsState) {
+            this.articles = observable.getArticles().slice(-1);
+        }
+        if (observable instanceof WeatherState) {
+            this.weathers = observable.getMeasurements().slice(-1);
+        }
+        this.render();
     }
 
     public render() {
-        throw new Error('Not implemented');
+        let answer = '<div class="mobile">\n';
+        this.articles.forEach(element => {
+            if (element !== undefined) {
+                answer = `${answer}[${element.time}] ${element.category} - ${element.title}\n`;
+            }
+        });
+        this.weathers.forEach(element => {
+            if (element !== undefined) {
+                answer = `${answer}[${element.time}] ${element.temperature} C, ${
+                    element.pressure
+                } P, ${element.humidity} U\n`;
+            }
+        });
+        console.log(`${answer}</div>`);
     }
 }