If macaroni and cheese is an inferior good, what would happen to the equilibrium price and quantity of macaroni and cheese if consumers' incomes rise? a. the equilibrium price would decrease, and the equilibrium quantity would increase. b. both the equilibrium price and quantity would increase. c. both the equilibrium price and quantity would decrease. d. the equilibrium price would increase, and the equilibrium quantity would decrease.

Assume that a local bank sells two services, checking accounts and atm card services. the bank’s only two customers are mr. donethat and ms. beenthere. mr. donethat is willing to pay $8 a month for the bank to service his checking account and $2 a month for unlimited use of his atm card. ms. beenthere is willing to pay only $5 for a checking account, but is willing to pay $9 for unlimited use of her atm card. assume that the bank can provide each of these services at zero marginal cost.refer to scenario 17-5. if the bank is unable to use tying, what is the profit-maximizing price to charge for a checking account