An ideal spring is initially compressed and placed between two blocks on a horizontal frictionless surface. The blocks are not attached to the spring. The left block is $2\mathrm{.}9$ kg and the right block is $7\mathrm{.}5$ kg $.$ After releasing the system from rest, the left block travels at $7\frac{m}{s}$ when it loses contact with the spring. The right block travels at $q,\frac{m}{s}$ when it loses contact with the spring.