A spring hangs from the ceiling with an unstretched length of x0 = 0.95 m. A m1 = 8.7 kg block is hung from the spring, causing the spring to stretch to a length xs = 1.14 m. Find the length Δx of the spring when a m2 = 3.7 kg block is hung from the spring. For both cases, all vibrations of the spring are allowed to settle down before any measurements are made.