Physics shows that when an object is thrown upward with an initial velocity of v is given by this quadratic function. 2 S = - 4.9t +v t + h 0 then its approximate height 0 A ball is thrown upward from the top of a building 15 meters high, at a velocity of 2.8m/sec. Answer the following questions. Be sure to show and explain all work. a) Find the maximum height and the time in which it was attained (round to 3 decimal places) b) When does it reach the ground? (round to 3 decimal places) c) Sketch a graph to illustrate your answers.