solve all parts from a to d please!

In Scheme, a list is denoted by a collection of items enclosed by parentheses. Scheme provides a procedure to build lists one element at a time. This procedure is called cons, a shortening of "constructor." Example: (cons 1 ' 0 ) builds the list (1) Exercise 2: a) Using the symbols one and two and the procedure cons, we can construct the list (one two) by typing (cons 'one (cons 'two ' (0) ). Using the symbols one, two, three, and four and the procedure cons, construct the following lists without using quoted lists (you may use quoted symbols and the empty list): (one two three four) b) Enter (2 1). What is the returned message? c) Enter ' (21) What does the quote do? d) We can extract the symbol a from the list (b (a c) d) using car and cdr by going through the following steps: (cdr(b(ac)d))=((ac)d) (car(cdr(b(ac)d)))(ac) (car(car(cdr(b(ac)d))))a