\fIn figure 3, AS may be positively sloped due to: contracts O flexible prices and wages O long run adjustments O all of the above O none of the aboveIn figure 3, to increase AD, the central bank could: O raise the required reserve ratio O raise the discount rate O buy bonds on the open market O all of the above none of the aboveIn figure 3, if the FED increases the money supply growth rate, then: O aggregate demand increases O the inflation rate increases the real GDP growth rate increases all of the above O none of the aboveIn figure 3, if AS decreases, then the inflation rate: and real GDP growth rise O rises and real GDP growth falls O falls and real GDP growth rises O and real GDP growth fall