a$.$ Look at the python script from the following link $-$ survey.py$,$ draw a diagram $($like we did in slides for Person, MITPerson, etc.$)$ that shows the hierarchy of the classes in the code.

b$.$ Look at the same python script from question $2,$ find the class: Pregnancies, how many functions are in it$,$ and list them as comments in the $.$ipynb file

c$.$ Write a function that returns the mean of a list that is passed as a formal argument to a function. Create a list with values $[10,56\mathrm{.}7,56,89,100,99,87\mathrm{.}5,34,985,10]$ and pass it to the above$-$defined function. Print the mean of the list of values

d$.$ Add a breakpoint to the mean function $($created in question $4)$ such that the interactive console of PDB can be used to look at the values of the mean after each item in the list is calculated$(1$ point$).$ Only the updated code is required