For your Spring Break destination you have chosen Cancun. The marginal benefit (MB) and the marginal cost (MC) of vacationing in Cancun are described as: MB (in $) MC (in $) 1 st day 500 400 2 nd day 400 300 3 rd day 300 200 4 th day 151 150 5 th day 50 150 If you are rational, how many days will you spend in Cancun? Why?