Hey I was wondering if I could get an explanation that allows me to solve this problem. Would appreciate all the formulas that were being used along with how to use them. Thanks.

12. In the figure, a 5.00-kg block is moving at 5.00 m/s along a horizontal frictionless surface toward an ideal massless spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. What is the speed of the block when it has moved so that the spring is compressed to only one-half of the maximum distance? m= Skg V= S.m/s 5.00 kg 5.00 m/s