Assume thezero-coupon yields ondefault-free securities are as summarized in the followingtable:

Maturity

1 year

2 years

3 years

4 years

5 years

Zero-Coupon Yields

6.30

6.30%

6.70

6.70%

6.90

6.90%

7.20

7.20%

7.60

7.60%

What is the maturity of adefault-free security with annual coupon payments and a yield to maturity of 6.30 %

6.30%? Why?