Question $2$: generate$\_$descriptors$()$

Write a function called generate$\_$descriptors$($df$)$ which takes in the DataFrame you loaded from Question$1$ and returns a dataframe of all unique ticket descriptions and how frequent they are $($e$.$g$.$ it will tell you how many "HANDICAP" or $"$NO PERMITS U$/$M$"$ tickets have been issued$)$ for each of the following three time periods: morning $(3$ am to $11$:$59$ am$),$ afternoon $(12$ pm $-5$:$59$ pm$),$ and evening $(6$ pm $-2$:$59$ am$).$

Make sure you drop na values of input df$.$

The DataFrame which generate$\_$descriptors$($df$)$ returns should have $3$ rows and $51$ columns.

Index should be labelled as Morning, Afternoon, and Evening.

Column names should be unique values of df$["$Description$"].$