Worksheet DrRacket Write an expression to test the following function definitions: Explain 1. (define f (lambda (x) (*x 2)) 2. (define (list-get-element p n) (if ( n 1) (car p)spi (list-get-element (cdr p)(n1) 3. (define (list-length p) (if (null? p) 1 (list-length (cdr p)))) 4. (define (list-reverse p) (if (null? p) null (list-append (list-reverse (cdr p)) (list (car p) Worksheet DrRacket Write an expression to test the following function definitions: Explain 1. (define f (lambda (x) (*x 2)) 2. (define (list-get-element p n) (if ( n 1) (car p)spi (list-get-element (cdr p)(n1) 3. (define (list-length p) (if (null? p) 1 (list-length (cdr p)))) 4. (define (list-reverse p) (if (null? p) null (list-append (list-reverse (cdr p)) (list (car p)