Can you help me?

(1) Find the standard equation of the sphere having (-1, 2,6) and (2, -2, 1) as endpoints of a diameter.(2) Determine the angle 0, in degrees, between the vectors u and v given by u = i+ 2j - 3k and v = 3j + 5k.(3) A 5400-pound sport utility vehicle is parked on an 18 slope. Assume theonly force to overcome is that due to gravity. Find (a) the force required to keep the vehicle from rolling down thehill and (b) the force perpendicular to the hill.