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Question 14, 15.5.87 HW Score: 62.5%, 10 of 16 points O Points: 0 of 1 Let c be a constant and let f and g be differentiable functions on R. Use the gradient rules V(cf) = cVf, V(f + g) = Vf + Vg, V(fg) = (VDg + fVg, and | )= gVf = fVg x + 5y to find the gradient of f(x,y) = 92 x 2 + y2 The gradient of f(x,y) is (Simplify your answers.)