A cart moves along a straight track. Its velocity increases linearly from 0 m/s at t = 0 s to 8 m/s at t = 4 s and then remains constant at 8 m/s until t = 6 s. What is the cart’s displacement during the 0 s to 6 s interval?
a) 48 m
b) 16 m
c) 32 m
d) 24 m