4. Ghana government Treasury bond due in one year has a yield of 19,30%; a Treasury bond due in 5 . years has a yield of 20.06%. A bond issued by CAL bank due in 5 years has a yield of 22.63%; a bond issued by Caterpillar due in one year has a yield of 22.16%. Calculate the default risk premiums on the bonds issued by CAL bank and Caterpillar