Question 21 (1 point) Which of the following function declaration would be illegal for a function that returns nothing and has one double parameter? O void f(x) void f(double x); O void f(double); O None of above Save Question 22 (1 point) Suppose that the function f has the following definition int f(int a, int b) ...) Which of the following statements are illegal? (Assume that i has type int and x has type double). O i-f(83,12); O None of above O x=f(83, 12); O x-f(3.15,9.28)