The suspension system of a 2000 kg automobile sags L0 cm when the chassis is placed on

Question:

The suspension system of a 2000 kg automobile "sags" L0 cm when the chassis is placed on it. Also, the oscillation amplitude decreases by 50% each cycle. Estimate the values of
(a) The spring constant k and
(b) The damping constant b for the spring and shock absorber system of one wheel, assuming each wheel supports 500 kg.