$(35$ points$)$ Design a program that calculates the perimeter and area for different shapes. This program will include $4$ modules:

$1).$ Main module: for the user to select the shape

$2).$ Rectangle module: call this module to calculate the perimeter and area for a rectangle, you need to ask about the width and length in this module

$3).$ Square module: call this module to calculate the perimeter and area for a square, you need to ask about the width in this module

$4).$ Circle module: call this module to calculate the perimeter and area for a circle, you need to ask about the radius in this module

a$)$ Submit pseudocode

b$)$ Submit flowchart