In Mutants & Masterminds (3rd ed), how does one make a PC vehicle (pg 221 of core) that has a large crew (e.g. a submarine, the S.H.I.E.L.D. Helicarrier, etc.)? Can I just say it has a large crew for flavour, or do I have to buy ranks of the Minion advantage and give the crew stats, or is there another way of handling this?