Will someone plzz help me answer 4 rocket questions? Thanks?

Question

1. How is Newton's second law related to rocket flight?
2. Why is Newton's second law important in designing efficient rockets?
3. Summarize how Newton's laws of motion all work together to allow a rocket to fly.
4. Explain how Newton's third law (action-reaction) causes a rocket to lift off.

Answer 1

see: http://en.wikipedia.org/wiki/Newton%27s_law#The_Three_Laws_of_Motion