Complete each of the following statements. a) If investors in the U.S. and Canada require the same real interest rate, and the nominal rate of interest is 2% higher in Canada, the purchasing power parity (PPP) suggests that the value of the Canadian dollar should (blank) against the U.S. dollar by approximately (blank) %. b) If the (blank) is equal to the difference in the nominal rate of interest between two countries, covered interest arbitrage is not feasible.