I need the answer for question 7(a,b,c, and d)

Suppose that, because of unexpected changes in the economy, the default risk premium increases to 0.8 percent. Assuming that no other changes occur, what is the appropriate yield to be offered on the commercial paper? Determine the forward rate for various one-year interest rate scenarios if the two-year interest rate is 8 percent, assuming no liquidity premium. Explain the relationship between the one-year interest rate and the one-year forward rate while holding the two-year interest rate constant. Determine the one-year forward rate for the same one-year interest rate scenarios described in question (a) while assuming a liquidity premium of 0.4 percent. Does the relationship between the one-year interest rate and the forward rate change when considering the liquidity premium is considered? Determine how the one-year forward rate would be affected if the quoted two-year interest rate rises; hold constant the quoted one-year interest rate as well as the liquidity premium. Explain the logic of this relationship. Determine how the one-year forward rate would be affected if the liquidity' premium rises and if the quoted one-year interest rate is held constant. What it the quoted two-year interest rate is held constant? Explain le logic of this relationship. After-Tax Yield Determine how the after-tax yield from investing in a corporate bond is affected by higher tax rates, holding the before-tax yield constant, Explain the logic of this relationship. Debt Security Yield