5) Using the supply and demand curves, you can unambiguously predict an increase in equilibrium quantity if: a) supply and demand both decrease b) supply and demand both increase c) demand decreases and supply increases d) demand increases and supply decreases 6) If the price index has gone up and nominal GNP has gone down, then we know that: a) real GNP has gone up b) real GNP has stayed constant c) real GNP has gone down d) we cannot tell from the facts whether (a),(b) or (c) has happened