Two people with a combined mass of 125 kg hop into an old car with worn-out shock

Question:

Two people with a combined mass of 125 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 8.00 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.65 s. Find
(a) The total load supported by the springs
(b) The mass of the car.