A block (B) is attached to two unstretched springs S₁ and S₂ with spring constants k and 4k respectively (fig i). The other ends are attached to identical supports M₁ and M₂ not attached to the walls. The springs and supports have negligible mass. There is no friction any where.  The block B is displaced towards wall 1 by a small distance x (fig, ii) and released. The block returns and moves a maximum distance y towards wall 2. Displacements x and y are measured with respect to the equilibrium position of the block B. The ratio y/x is