Compute all parts of given question:
Question: Blocks with masses of 3.0 kg, 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 15N force applied to the 3.0 kg block.
Part A: How much force does the 4.0 kg block exert on the 5.0 kg block?
Part B: How much force does the 4.0 kg block exert on the 3.0 kg block?
I need expert help to solve the above question and express your answer to two significant figures and include the appropriate units.