21. (Mr. Rehman is aged 25 years and has been saving Rs. 30000 at the until his retirement at age 60 and earns 8% interest. He spends Rs. 30,00,000 on purchase of a house after retirement and earns 6% per annum interest on the saved amount. If his life expectancy is assumed to be 75 years, how much can he spend every year after retirement leaving no estate? The amount is withdrawn at a the beginning of the year. 22 In the