In the Racket programming language, define a procedure named twice that takes a procedure of one argument and and returns a procedure that applies the original procedure twice. For example, if square is a procedure that squares its argument, then (twice square) returns a procedure that raises its argument to the power 4. If inc is a procedure that adds 1 to its argument, then (twice inc) returns a procedure that adds 2 to its argument.

Use a lambda expression to define the procedure returned by twice.

Check your twice procedure using these tests: (define (square *) (* x x)) ((twice square) 5) 625 ; (52) (define (inc x) (+ x 1)) ((twice inc) 5) 7 ; (5 + 1) + 1