A potter’s wheel starts from rest and follows three successive stages:
1. It accelerates at 1.5rad/s2 for 4.0s.
2. It then spins at the constant angular speed reached at the end of stage 1 for 6.0s.
3. Finally, it decelerates uniformly to rest in 5.0s.
What is the total angular displacement of the wheel during the entire process?
a) 57rad
b) 63rad
c) 48rad
d) 75rad