Please don't use the excel

(20 points) Consider the term structure {rt}t>o with rt = 0.1 +0.03t. Boromir borrows 1000 from Legolas for 10 years, making interest-only payments at the end of each year and returning the whole principal at the end of the term. The interest-only payments at the end of a year are based on the floating rate available at the beginning of that year. Boromir is not happy with this arrangement, however, as he cannot anticipate the future rates. Gimli agrees to act as a financial intermediary, guaranteeing Boromir's payments in the sense that they will always be based on the forward rates determined by the original term structure. Assuming the floating rate u[3,4] = 0.2, what is Gimlis net cashflow (income - outgo) at time 4