6. A corporation issues two separate 30-year $10.000 callable bonds. Both bonds have semi- annual coupons and are priced at the same annual effective yield rate i. Both bonds are callable at par anytime starting at the time of the nth coupon up to the 60th coupon. Bond A has a coupon rate of 8% and has a price of $12,311.48. Bond B has a coupon rate of 5% and has a price of $8,616.22. Find n and