Compute the each part of given question:
Question: A horizontal mass-spring system is in SHM. The mass is 0.25kg, the spring constant is 12N/m, and the amplitude is 15cm,
Part I: What is the maximum speed of the mass and where does it occur?
Part II: What is its speed at the 1/2 amplitude position of its motion?
Please, try to give explanation. Thank you.