The following table gives the prices of Treasury Bonds. What is the zero-rate (continuously compounded) for 1.5 years?

Bond Principal ($)	Time to Maturity (years)	Annual Coupon ($)	Bond Price ($)
100	0.5	0	97.7
100	1.0	0	94.7
100	1.5	7.1	100.5

(enter percentage in decimal form to four decimal places, i.e. eleven and a half percent would be entered as 0.1150)