A two-stage rocket is launched with a payload on the top (the stages are denoted by different colors in the model). Both

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A two-stage rocket is launched with a payload on the top (the stages are denoted by different colors in the model). Both stages are 9000 kg, which includes 7200 kg of fuel, and the attached payload is 570 kg. The fuel is a liquid oxygen and kerosene mix which burns at a rate of 140 kg/s with a relative velocity of 3900 m/s. The rocket is fired vertically and we'll assume gravity to remain constant. The height when the first stage finishes is (put. units in the second box) The height when the second stage finishes is (put units in the second box) *Make sure all answers are correct*