add to Task 16

09_intro_to_Numpyro.ipynb

@@ -459,6 +459,7 @@
     ":class: tip\n",
     "- You might have correctly noticed that we have not looked at the `Predictive` capability. Study the documentation of Numpyro (in particular, `numpyro.infer`) and demonstrate the `Predictive` command on the example shown above.\n",
     "- Study the documentation of Numpyro (in particular, `numpyro.diagnostics`) to understand what the `hpdi` command does. Apply it to the example shown above.\n",
+    "- Look up documentation of `mcmcm.last_state` and explain what it is doing.\n",
     "`````"
    ]
   },