(1 point) For each of the following functions, find the maximum and mimimum values of the function on the circular disk: x² + y² ≤1. Do this by looking at the level curves and gradients. (A) f(x, y) =x+y+3: maximum value= minimum value = (B) f(x, y) = 3x²+4y²: maximum value = minimum value = (C) f(x, y) 3242: maximum value = minimum value =