9. (a) What is uncovered interest parity (UIP)? (b) Suppose that the Australian dollar is expected to depreciate against the Japanese yen by 4% during the next 12 months. The nominal interest rate in Japan is 1% per annum. If uncovered interest parity holds (UIP), what must the nominal interest rate in Australia be? Empirically, UIP is often tested by running the following regression: Aet+1 = a: + BU: 3t) + \"1+1 where at is the natural logarithm of the spot exchange rate at time t, M\