$1.$ In SmallTalk, write each of the classes below:

$($a$)$ Shape: contains $2$ values: area and perimeter. Will need getters for both. Will

need a constructor to set both.

$($b$)$ Circle: it will inherit from Shape. It will store one value radius. It will have a

getter for radius. It will need a constructor that take in radius; will need to set

area and perimeter in the parent.

$($c$)$ Rectangle: it will inherit from Shape. It will store two values lrngth and width. It

will have a getter for both. It will need a constructor that take in both; will need

to set area and perimeter in the parent.

$($d$)$ Square: it will inherit from Retancgle. It will store no values; instead it will set

Rectangle length and width. It will have a getter for length. It will need a con$-$

structor that take in length; will need to set area and perimeter in the parent.

$($e$)$ Write a section of code to create an instance of each above and call each of their

functions on them.