Question

A particle moves according to the equation x=2t^2-5t+6.Find i) average velocity in the last 3 sec ii)Velocity at t=3s.
a) 1 m/s, 7 m/s b) 4 m/s,3 m/s c)2 m/s, 5 m/s d)3 m/s, 7 m/s