Fill in the blanks.

a. ` 50,000 now is equivalent to ` after 10 years. at a rate of interest 10%.

b. ` 50,000 is equivalent to an annual payment of ` for a period of 10 years at an interest rate of 10%.

c. T he present value of a sum of ` 129,700 to be received 10 years hence at an interest rate of 10% is ` .

d. ` 8,137.50 every year for next 10 years at a rate of interest of 10% is equivalent to a future sum of ` at the end of 10 years.

e. ` 50,000 payable at the end of 10 years is equivalent to ` at present at an interest rate of 10%.

f. A t an interest rate of %, ` 5 lakh invested today will be worth ` 10 lakh in 9 years.