6. math of interest. please solve correctly

Piotr owes $22,212.00 on a loan for doing some house renovations. If he makes quarterly payments of $1,638.47 (at the end of each period) how many periods will it take to pay off his loan? The interest rate is 1.725% compounded weekly. (Answer to the nearest whole number.) a. n=10. b. n=15. c. n=12. d. n=14 e. n=16. Certainty 3 : C=1 (Unsure: 67% ) C=3 (Quite sure: >80% )