A basketball whose mass is 0.680 kg falls from rest through a height of 5 m and then bounces back. On its way up, it passes by a height of 3.10 m with a speed of 2.50 m/s.

What is the speed of the basketball when it reaches the top of its motion?

a) 1.79 m/s
b) 2.05 m/s
c) 2.21 m/s
d) 2.38 m/s