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Physics question PLEASE HELP ASAP!!!?

Three people, each with a mass of 71.1 kg, are in a car with a mass of 1130 kg. An earthquake strikes. The driver manages to pull of the road and stop, as the vertical oscillations of the ground surface make the car bounce up and down on its suspension springs. When the frequency of the shaking is 1.60 Hz, the car exhibits a maximum amplitude of vibration. The earthquake ends and the three people leave the car as fast as they can. By what distance does the car‘s undamaged suspension lift the car‘s body as the people get out?(give answer in cm)Im pretty sure you have to use these equations: *Let mass of all 3 peoplem *Let mass of carM(2*Pi*f)^2 k/(M+m)k*delta(x) (M+m)*gThe aim is to get delta(x) which is the amplitude in relation to the equilibrium position.I got 9.70cm to 3 s.f. (0.09696753093 m) and it said it was wrong :(

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