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20. A ball with mass 0.15 kg is thrown upward with initial velocity 20 m/s from the roof of a building 30 m high. Neglect air resistance.22. Assume that the conditions are as in Problem 20 except that there is a force due to air resistance of magnitude (v^2)/1325 directed opposite to the velocity, where the velocity v is measured in m/s.(a) Find the maximum height above the ground that the ball reaches.(b) Find the time that the ball hits the ground. (you can use wolframalpha)I only need help with 22.