A mass of 4.0 kg is in motion along a horizontal, frictionless surface with a speed of 2.5 m/s when it makes contact with a horizontal spring anchored to a wall. The spring compresses and brings the mass to a momentary rest. The spring constant is 1250 N/m. a)Determine the maximum distance the spring is compressed. b)Determine the speed of the block when the spring is compressed a distance of 9.5 cm. I had noticed that someone else had asked this same question, but whoever answered, but I didn't really understand. If you could please provide clear step I would really appreciate it.