Write a complete C$++$ program including UML, and demonstrate concepts of Inheritance and polymorphism. You can write two separate programs. One demonstrate Inheritance $,$ and second one demonstrate polymorphism.

Please note:

$$ use sufficient comments to clarify use of syntax

$$ separate input, process and output instructions by a comment $($in$-$process$-$out$)$

$$ Use meaningful variable $($identifier$)$ in the program.

$****$ PLEASE WRITE THE FOLLOWING PROGRAM IN C$++*****$