Suppose that w = xe"/, where * = t', y = 1 - 2t, and z = 1 + 6t. dw Find dtLet s = f(x, y, z) and r = x(u, v, w), y = y(u, v, w), z = z(u, v, w). To calculate (2, 5, 1), which of the following pieces of data do you NOT need? O Cu(6, 8, 7) = 30 O f(6, 8, 7) = 11 O x (2, 5, 1) = 6 Of=(6, 8, 7) = 23 Of=(2, 5, 1) = 27 O yu (2, 5, 1) = 12 O z(2, 5, 1) = 7 Oy(2, 5, 1) = 8 O f (2, 5, 1) = 20