A skydiver weighs 125 pounds, and her parachute and equipment combined weigh another 35 pounds. After exiting from a plane at an altitude of 15,000 ft., she waits 15 seconds and opens her parachute. Assume that her velocity is subject to air resistance for the given proportionalities: one half the velocity during the free fall ten times the velocity after the parachute opens. 1) Assume that her initial velocity upon exiting the plane is zero. What is her velocity and how far has she traveled 20 seconds after exiting the plane? 2) How does her velocity at 20 seconds compare to her terminal velocity? 3) How long does it take her to reach the ground?