Please I'm stuck with this one.

If we know that a portfolio, it has the following relation: 1+ i^Y_t = (1.08 + 0.005t)^1 + 0.1 Y For t = 1, 2, 3, 4, 5 y y = 0, 1, 2, ... 10. If $1,000 Are invested for three years beginning in year y = 5, Find the effective interest rate level. If we know that a portfolio, it has the following relation: 1+ i^Y_t = (1.08 + 0.005t)^1 + 0.1 Y For t = 1, 2, 3, 4, 5 y y = 0, 1, 2, ... 10. If $1,000 Are invested for three years beginning in year y = 5, Find the effective interest rate level