Oscillations Part 2

A block of mass 2 kg is attached to one end of a massless spring whose other end is fixed at a wall. The spring-mass system moves on a frictionless horizontal table. The spring's natural length is 2 m and spring constant is 200N∕m. The block is pushed such that the length of the spring becomes 1 m and then released. At distance xm(x<2) from the wall, the speed of the block will be