(1 point) A skydiver weighing 170 lb (including equipment) falls vertically downward from an altitude of 15,000 ft and opens the parachute after 18 s of free fall. Assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.75 | | when the parachute is closed and is of magnitude 14 | | when the parachute is open, where the velocity v is measured in f/s. Assume that acceleration due to gravity has magnitude 32 fu/s/s, remember that weight is the product of mass and gravitational acceleration. Find the speed of the skydiver when the parachute opens. Speed is fUS Find the skydiver's height when the parachute opens. Height is it Find the limiting velocity up after the parachute opens. (Think about whether this should be positive or negative.) UL ft/s