Attempt 16 Use the Chain Rule to evaluate the partial derivatives - and- du at ( u , U ) = (-3, -3). f ( x, y, z) = x3 + yz, x =utv, y= utu, z=2uu (Give exact answers. Use symbolic notation and fractions where needed.) = -1620 au | (u,v)=(-3,-3) = -3564 au | (u, v)= (-3,-3) Incorrect