(1 point) Suppose f(;c, y) : .232 + y2 7 8:19 7 4y + 3 (A) How many critical points does f have in R2 ? (B) If there is a local minimum. what is the value of the discriminant D at that point? If there is none, type N. (C) If there is a local maximum. what is the value of the discriminant D at that point? If there is none, type N. (D) If there is a saddle point, what is the value of the discriminant D at that point? If there is none, type N. (E) What is the maximum value of f on R2 ? If there is none, type N. (F) What is the minimum value of f on R2? If there is none, type N