5. a≤1200 where a=number of people that can be seated
6. x≥3 where x=number of swimmers in an event
I believe the Berlin Airlift was necessary because Berlin was located in East Germany (a Soviet satellite) and at this time (the cold war) there were geopolitical tensions between the Soviet Union and the United states. so because of this the only viable option to supply west Berlin was to do an Airlift.
William Taft (c) is the answer and on requesting for the results