Question 3) (5 points) Below, a procedure named "get-numbers-only" is given, which has a single parameter named "Ist". Assume that "Ist" is a list (no need to check if it is really a list or not). The procedure produces the same list as "1st" where all the items which are not numbers are dropped, but the elements of "Ist" which are numbers are kept in the same order as given in "1st". You can also see some example use of this procedure below. Note that if an element of "Ist" is sublist, this sublist is also dropped. Please fill in the blanks to implement this procedure. 1 ]-> (define get-numbers-only (lambda (1st) (if (...... lst) 0) (if (number? (car lst)) (......(car lst) (get-numbers-only 6...... lst))) (............ lst)))))) Value: get-numbers-only 1 ]-> (get-numbers-only '(1 2 3 2)) ;Value 13: (1 2 3 2) 1 ]-> (get-numbers-only '(1 a -3.7 b)) Value 14: (1 -3.7) 1 ]=> (get-numbers-only '(1 a (23) b 4 c (5) a (e 6))) ; Value 14: (1 4) 1 ]=> (get-numbers-only) ; Value: () 1 ]-> (get-numbers-only '(a b c)) Value: ()