PLEASE SOLVE USING EXCEL! Question $4$

Consider the corporate bond of the previous question. Suppose that a US Treasury bond with the

same coupon rate and maturity trades at par.

a$)$ What is the fair credit spread of the corporate bond?

b$)$ What would be the credit spread if there was no compensation for default risk i$.$e$.$ if the fair

interest rate to discount the corporate bond was equal to the fair interest rate to discount the

Treasury bond?