20.3 A 10-year regular-premium term assurance policy is issued to a life aged 40. The sum assured is 20,000 and is payable at the end of the year of death. Expenses of 72 are assumed to be incurred at the start of each year in which the policy is in force, except at the start of the first year when the expense is 425. The gross premium is 1,700 pa. Write down an expression for the gross premium retrospective reserve immediately before the 6th premium is due. 20.4 A temnorarannuity 2 od