Which of the following bonds would be cheapest to deliver given a T-note futures price of 78.6075? (Assume that all bonds have semiannual coupon payments based on a par value of $100.)

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Answers:	a. 6.5-year bond with 3% coupons and a yield of 1.5%
	b. 8.5-year bond with 8.5% coupons and a yield of 10%
	c. 10-year bond with 5.5% coupons and a yield of 6%