For a damped simple harmonic oscillator, the block has a mass of 2.4 kg and the spring constant is 14 N/m. The damping force is given by -b(dx/dt), where b = 260 g/s. The block is pulled down 11.0 cm and released. (a) Calculate the time required for the amplitude of the resulting oscillations to fall to 1/4 of its initial value. (b) How many oscillations are made by the block in this time?