Question 5 16 Let f(I, y) = x2 + 2 1. Find the differential of f at (2, -2). (enter a, b, c, d, or e) a df = dx + dy b df = dx - dy cdf = -dx + dy d df = d.x N/ H dy e df = - dax + dy 2. Use the differential in part 1 to find f(2.03, -2.01) - f(2, -2). (enter a decimal number)