Consider the system of two blocks and a spring. The horizontal surface is frictionless, but there is static friction between the two blocks. The spring has a force constant k = 150 N/m. The masses of the two blocks are m = 0.500 kg and M = 6.00 kg. You set the blocks into motion by releasing block M with the spring stretched a distance d from equilibrium. You start with small values of d and then repeat with successively larger values. For small values of d, the blocks move together in SHM. But for larger values of d, the top block slips relative to the bottom block when the bottom block is released. What is the period of the motion of the two blocks when d is small enough to have no slipping?