The cash prices of 6-month and 1-year Treasury bills are 94.0 and 89.0. A 1.5-year Treasury bond that will pay coupons of $$\$ 4$$ every 6 months currently sells for $$\$ 94.84$$. A 2-year Treasury bond that will pay coupons of $$\$ 5$$ every 6 months currently sells for $$\$ 97.12$$. Calculate the 6-month, 1-year, 1.5-year, and 2-year Treasury zero rates.