please use formula not excel

Mandatory Questions (1-4) On valent cost of the following cash flow diagram? The interest rate is 10%. 7 6 0 5 4 S5k S5k S10k B) Determine the two equal deposits, the first depooio0 at the end onnually the end of year 6, so that you can withdravet years. Assume that equal deposits, the first deposit required now money can earn 4% interest. and the second deposit at pounded com C) A bank advertises t pa vs 4% annual interest. com- pounded daily. on savings accounts, provided the money is left in the account for 5 years. What is the ffective annual interest rate