6. For a special three year term insurance on (90), you are given the follow- ing. (i.) k 0 1 2 P90+k 0.904 736 8421 0.893 542 7574 0.879 557 291 7 (ii.) The following benefits are payable at the end of year of death. k | bk 1 4000 2 5000 3 6800 (iii.) i = 0.05 Calculate the mean and variance of the present value of the benefit payment