A ten-year corporate bond is yielding 7.2% per year. If the corporate bond's yield includes a 0.4% per year liquidity premium and a 2.6% per year default premium, what is the yield on a ten-year Treasury bond? 1) 4.0% 2) 4.6% 3) 4.2% 4) 4.8% 5) 4.4%