The cash prices of six-month and one-year Treasury bills are 98.5 and 96.7. A 1.5-year bond that will pay coupons of $3 every six months currently sells for $103.5. A two-year bond that will pay coupons of $5 every six months currently sells for $112.00. Calculate the six-month, one-year, 1.5-year, and two-year zero rates.