Newton’s 2nd Law

The Problem:

Two blocks (m₁ = 5 kg, m₂ = 2.5 kg) are in contact on a frictionless table. A constant horizontal force of magnitude F_A is applied to the larger block as shown.

Find the magnitude of the force F_1 on 2 exerted by the larger block on the smaller block.

Find the magnitude of the force F_2 on 1 exerted by the smaller block on the larger block.