Use the following table to answer this question, which provides information on the production of a product that requires one variable input.InputTotal Product00102002060030720408205090060980The marginal product of the 40th input item is 

The aggregate demand curve:

a. shows the level of real GDP purchased in the economy at different possible price levels during a period of time. b. shows the level of real GDP produced in the economy at different possible price levels during a period of time. c. shifts to the left whenever there is an increase in aggregate expenditures. d. slopes upward.

In a typical month, a family buys six bags of candy bars as snacks when the price of a bag costs $4.00. When the price of the candy bars falls to $3.00 a bag, the family buys seven bags of candy bars a month. When the price of a bag of candy bars rises

to $6.00, the family buys three bags a month. Answer these questions: (a) How did the fall in the price affect real income in terms of bags of candy bars? (b) How did the rise in the price affect real income in terms of bags of candy bars? [Hint: How many bags of candy bars could the family buy in situation (a) and in situation (b) without changing the amount they spend on candy bars in a typical month? Please provide the best answer for the statement.