You are moving a satellite from a circular orbit at 700 km altitude to one at 320 km altitude. a. What is the energy of the transfer orbit? b. What is the velocity change (Delta V1) needed to go from the initial circular orbit into the transfer orbit? c. What is the velocity change (Delta V2) needed to go from the transfer orbit to the final circular orbit? d. What is the time (TOF) required for the transfer?