Please use Scheme to define these two function. Thank you!

1. Define a SCHEME function, named square-pair, to take a number, and return a pair with the number and its square. 2. Define a SCHEME function, named (rev p), which takes a pair as an argument and evaluates to another pair with the first and second elements in the pair p in reverse order. For instance, > (rev (cons 1 2)) ( 21)