If a market is NOT at equilibrium O a. both supply and demand will shift until the market reaches equilibrium. X Incorrect O b. demand will shift until the market reaches equilibrium. O c. the price will change and, in response, market participants will move along the existing supply and demand curves until the market reaches equilibrium. O d. supply will shift until the market reaches equilibrium. Which one of these would be included in GDP calculations? O a. nails purchased by a building contractor O. b. a windshield purchased by General Motors X Incorrect O c. petroleum purchased by a refiner from the company that drilled it O d. a hamburger purchased by a hungry restaurant patron Everything else the same, if investment expenditures rise by $300 billion and imports increase by $300 billion, then GDP