A network client requires you design a shell script that allows the user to enter the length and width of a rectangle. The perimeter of a rectangle is then calculated and printed to the computer screen. You are required to produce: (a) an IPO chart, (b) a method, (c) a desk check, (d) a shell script and (e) user documentation on how to use this scrip (include screen captures).
Perimeter = 2 * (length + width)