Solve the all parts of given question:
Question: A force F of 20N acts on two blocks on a frictionless surface. Block A is 3.0kg and Block B is 2.0kg.
Part A: What is the acceleration of the system?
Part B: What is the magnitude of the force that block A exerts on block B?
Part C: What is the magnitude of the force that block B exerts on block A?
Express your knowledge to solve the above question.