Problem 35.11 The following table shows the annual effective interest rates credited to an investment fund by calendar year of investment. The investment year method applies for the first two years, after which a portfolio method is used. cy 12 2y+2 y il 1995 t 5.5% 4.5% 1996 6.0% 6.1% 5.0% 1997 7.0% t + 2.5% 5.5% An investment of $100 is made at the beginning of 1995 and 1997. The total amount of interest credited by the fund during the year 1998 is $13.81. Find t. Problem 35.11 The following table shows the annual effective interest rates credited to an investment fund by calendar year of investment. The investment year method applies for the first two years, after which a portfolio method is used. cy 12 2y+2 y il 1995 t 5.5% 4.5% 1996 6.0% 6.1% 5.0% 1997 7.0% t + 2.5% 5.5% An investment of $100 is made at the beginning of 1995 and 1997. The total amount of interest credited by the fund during the year 1998 is $13.81. Find t