Which of the following bonds would have the greatest percentage increase in value if all interest rates in the economy fall by 1%?

	1.	10-year, zero coupon bond.
	2.	1-year, 10% coupon bond.
	3.	20-year, zero coupon bond.
	4.	20-year, 5% coupon bond.
	5.	20-year, 10% coupon bond.