A loan of 350.000.000 is sought and the market offers the following alternative:

a. Monthly nominal rate in arrears of 1.97% at 10 years.

b. Quarterly Nominal rate in arrears 6.57% at 12 years.

c. Effective annual rate of 18.9% at 20 years.

a. What is the best option, considering that each case offers alternative amortization? French and German?

b. If additional annual payments of 3.000.000 are made, how long will it take to finish paying credit in each of the alternatives.