An object undergoes uniformly accelerated motion from point

Question

Problem: An object undergoes uniformly accelerated motion from point x1 = 9 m at time t1 = 3 s to point x2 = 41 m at time t₂ = 8 s. (The direction of motion of the object does not change.)

Part A: Determine the magnitude of the instantaneous acceleration of the object at time t₂.

I want help to determine the magnitude of the instantaneous acceleration of the object at time t₂.