If the mass of a particle is 2, and x>0.

1.What would the total energy be if the particle was released at x+4?

2. What would the particle's velocity be at x=3?

3.Where is the maximum velocity?

4. What is the period of the motion using:

This question has been giving me sleepless nights but no matter what i try i don't seem to get anything like a reasonable answer.

Thank you