An investor earns a return of 6.90% per year on his investment into a portfolio of stocks in the transportation sector. The inflation has has been 2.75% per year, and it is explected to stay at this level in the foreseeable future. Calculate the return that the inverstor's portfolio of stocks provides per year in real terms. (a) Using the exact formula, it should equal 9. Put your answer in percent, NOT in decimals. Do NOT use "96" in your answer. Round to two decimal places. For example, if you got 12.34%, put 12.34. (b) Using the approximate formula, it should equal 9. Put your answer in percent, NOT in decimals. Do NOT use "9" in your answer. Round to two decimal places. For example, if you got 12.34%, put 12.34