2. Consider a two-stage rocket designed to provide an ideal AV of 3000 m/s. The following information is known: The following information is known: Payload mass = 100 kg 1st Stg: y = 0.9, Isp 250 sec, 45% of Total AV 2nd Stg: y = 0.85, Isp 300 sec, 55% of Total AV While the y values quoted above account for the propulsion systems, the interstage structure is generally treated separately. Assume that the weight of this component is equivalent to 5% of the mass of the Stg2/payload combination it supports. Determine: a) Stage 2 propellant and inert masses b) Interstage mass c) Total vehicle mass