A tennis player moves in a straight-line path as shown in the graph below. The vertical divisions of the figure below represent 1.0 m and the...

A tennis player moves in a straight-line path as shown in the graph below. The vertical divisions of the figure below represent 1.0 m and the horizontal divisions represent 3.5 s. Find the instantaneous velocities of the tennis player at the following times: (b) t = 7.0 s(c) t = 10.5 s(d) t = 15.8 s