Natalie received a loan of $8,500 at 3.92% compounded semi-annually from a credit union to use as working capital for his business. He had to make semi-annual payments for a period of 5 years to settle the loan.

a. Calculate the size of his payments.

Round to the nearest cent

b. What was the total interest paid during the period?

Round to the nearest cent

c. What was the interest portion of payment number 3?

Round to the nearest cent