Question 9 0/1 pt 9 3 0 Details Let a = -52 - 23 - 1k and b = - 71 - 87 + 8k. Find a - b. Check Answer Question 10 0/1 pt 9 3 0 Details Let a = (3, 2, -2) and b = (6, 4, -8). Compute the projection of a onto b and the vector component of a orthogonal to b. proj; a Orthogonal complement = Check Answer Question 11 0/1 pt 9 3 0 Details A 1500-lb truck sits on a ramp inclined at 26. Find the (approx. ) magnitude of the force required to keep the truck from rolling down the ramp. 260 1500 lb Q F lbs