An investor is considering to invest in a project that requires $3.5 million as an intal investment cost. In retur, the project is expected to provide $570,000 per year in revenues and benets the study paid for project le 10 years, what should be the maximum interest rate that the investor should expect so that the project becomes acceptable. Use the B-C ratio method to solve this problem in the answer box, anar a number only and do not enter the percentage sign (5)