Refer to the accompanying table below. The average cost of 5 units of activity is:Units of ActivityTotal CostTotal Benefit0$0$01$2$122$6$223$12$304$20$365$30$406$42$427$56$43 

If the price of a firm's output rises, its

A) marginal product of labor increases. B) value of marginal product decreases. C) demand for labor increases. D) demand for labor decreases.

When the Fed buys bonds in the open market, we can expect the

A) exchange rate to rise and interest rates to fall. B) exchange rate and interest rates to rise. C) exchange rate to fall and interest rates to rise. D) exchange rate and interest rates to fall.