Answer :
The tradeoffs of Ray's times are the options that involve substituting time spent doing a fun activity for time spent doing homework. They are the options in which Ray spends more time doing homework and less time doing another activity. With this idea in mind, the trade-offs of Rau's time are:
He will spend one extra hour on homework and give up watching TV.
and
He will play his favorite game for one hour and do homework for two hours.
He will spend one extra hour on homework and give up watching TV.
and
He will play his favorite game for one hour and do homework for two hours.