Problem 2: A rocket has a payload of mass 1000kg and Isp 400s. The rocket's structural ratio is = 0.05. If this rocket needs to develop a Au = 26000m/s (in vacuum and in the absence of gravity), find: = a) The minimum mass that this rocket would have if it is two-stage b) The minimum mass that it would have if it is three-stage c) The minimum mass that it would have, for any number of stages