The coefficient of friction between the 2-lb block and the surface is  = 0.2. The block is acted upon by a horizontal force of P. Determine the maximum deformation of the outer spring

The coefficient of friction between the 2-lb block and the surface is  = 0.2. The block is acted upon by a horizontal force of P. Determine the maximum deformation of the outer spring B at the instant the block comes to rest. Spring B has a stiffness of K_B = 20 lb/ft and the "nested" spring C has a stiffness of k_c = 40 lb/ft.