Some of the Answers to the Questions are wrong, like 4iv) mass should be 292kg (52500wh/(0.9*200wh/kg)), and question 1, where you are not given the time for it to fly around the world, assuming its just the time between two different unrelated events (juno reaching the juptier and impulse 2 reaching its destination) would be naive and just plane wrong (the actual time for it to fly was 16 months).