Hello i need help answering this question: Fund X starts with 1000 and accumulates with a force of interest (t) = 1= (15-t), 0 < t < 15. Fund Y starts with 1000 and accumulates with a nominal interest rate of 8% compounded semi-annually for the first three years and an annual effective interest rate of i thereafter. Fund X has the same balance as Fund Y at the end of four years. Calculate i.