Suppose that f(x, y, z) = 2x + 1y + 2z at which 0 x, y, z 2. 1. Absolute minimum of f(x, y, z) is 2. Absolute maximum of f(x, y, z) is Suppose that f(x, y, z) = (x 3) + (y 3) + (z 3) with 0 x, y, z and x + y + z 12. 1. The critical point of f(x, y, z) is at (a, b, c). Then a = b = C = 2. Absolute minimum of f(x, y, z) is and the absolute maximum is Suppose that f(x, y) = x xy + y - 4x + 4y with x + y 16. 1. Absolute minimum of f(x, y) is 2. Absolute maximum is -16 3 8 Suppose that f(x, y) = 2x4 +2y4 2xy then the minimum is X