Blocks with masses of 10 kg 20 kg and 30 kg are lined up in

Question

Solve the all parts of given problem:

Problem: Blocks with masses of 1.0 kg, 2.0 kg, and 3.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 20N force applied to the 1.0 kg block.

Part A: How much force does the 2.0 kg block exert on the 3.0 kg block?

Part B: How much force does the 2.0 kg block exert on the 1.0 kg block?

This is a physic problem, reply as soon as possible. Thank you.