1. [-/1 Points] DETAILS LARCALC11 13.6.004. Use Theorem 13.9 to find the directional derivative of the function at P in the direction of the unit vector u = cos Oi + sin 0j. f ( x, y ) = y P(3, 0), 0 = - 5x + y 6 Need Help? Read It Submit Answer 2. [-/1 Points] DETAILS LARCALC11 13.6.008. Find the directional derivative of the function at P in the direction of v. f ( x, y) = x3 - ys, P(4, 3), v = V2 (i + j) 23. [-l1 Points] DETAILS LARCALC11 13.6.013. + Use Theorem 13.9 to find the directional derivative of the function at P in the direction of PQ. f(x,y)=e3\"sin(x), P(0.0), Q(3. 1) Z Need Help? 4. [-11 Points] DETAILS LARCALC11 13.6.015. Find the gradient of the function at the given point. f(x, y) = 3x + 2y2 + 7, (1,3) 5. [-/1 Points] DETAILS LARCALC11 13.6.020. Find the gradient of the function at the given point. w = x tan(y + z), (12, 10, -8) Vw(12, 10, -8) = Need Help? Read It Watch It 6. [-/1 Points] DETAILS LARCALC11 13.6.022. Use the gradient to find the directional derivative of the function at P in the direction of v. h(x, y) = e-4x sin(y), P(1, _, v = -i