A person deposits a sum of money at the end of every two months and for a period of 4 years, and at the end of the period he finds that the total of his money is 16,184,079, and if he knows that the nominal annual interest rate is 6% and that the interest is added at the end of every two months: Need to specify the amount of the payment? O a. 800 O b. 400 O c. 700 O d. 600 The present value of a regular payment of 1,000 dinars for a period of 5 years, if the discount rate prevailing in the market is 6% with compound interest, and --if the payments are normal (at the end of each year) are Select one: O a. 4 514.4 O b. 4 414.4 O c. 4 312.4 O d. 4 212.4