Victor invests 300 into a bank account at the beginning of each year for 20 years. The account pays out interest at the end of every year at an annual effective interest rate of i% . The interest is reinvested at an annual effective rate of i / 2 %. The yield rate on the entire investment over the 20 year period, if he would only make deposits of 300 due is 8% annual effective. Determine i.