6. According to Reuters, On June 17, 2020 \"[t]he People's Bank of China (PBOC) said in a statement that it had injected 70 billion yuan ($9.88 billion) into the country's money market through 14-day reverse repurchase agreements, at a rate of 2.35%, down from 2.55% previously.\" (a) How much more than 70 billion yuan will it cost (in yuan) to buy back the bonds from the P300 at the end of the 14-day period? (b) A change in the policy rate can be categorized via the optimal rate rule in terms the change in ination as follows: 0 expansionary if the new;r rate is lower than what the change in ination indi- cated. o contractionary if the new rate is higher than what the change in ination indicated. 0 neither expansionary or oontmctionary if the new rate in what the change in ination indicated. If there was no change in ination when the PBOC changed the reverse-rope rate, was their action expansionary, contractionary, or neither? Briey explain