Determine all critical points for the following function. _ 3 f(x) 3x(16 - x) E) x = D (Use a comma to separate answers as needed.) Determine all critical points for the following function. 2 250 f(X)=X +7 x= |:| (Use a comma to separate answers as needed.) The function V(x) = x(5 - x)(8 - x), 0