Consider a spring whose natural length is 20 cm is compressed by 10 cm and placed between two masses M= 8.0 kg and m= 4.0 kg. the spring constant is 200N/m and coefficient of kinetic friction between the blocks and the floor is 0.15 . The blocks are released and the spring decompresses and falls to the floor. What is the distance between the blocks when they come to stop? Assume that the work done by the friction during the expansion of the spring is negligible.