detailed expalnation please

Question 1 ABC company has decided to borrow moncy by issuing perpetual bonds with a coupon rate of 6.5%, payable annually, and a par value of $1,000. The 1-year interest rate is 6.5%. Next year, there is a 35% probability that interest rates will increases to 8% and a 65% probability that they will fall to 5%. - What will the market value of these bonds be if they are noncallable? 4. If the company decides instead to make the bonds callable in one year, what coupon will be demanded by the bondholders for the bonds to sell at par? Assume that the bonds will be called if interest rates fall and that the call premium is equal to the annual coupon. . What will be the value of the call provision to the company? Question 2 New company is considering whether to call either of the two perpetual bond issues the company currently has outstanding. If the bond is called, it will be refunded, that is, a new bond issue will be made with a lower coupon rate. The proceeds from the new bond issue will be used to repurchase one of the existing bond issues. The information about the two currently outstanding bond issues is: The corporate tax rate is 30%. What is the NPV of the refunding for cach bond? Which, if either, bond should the company refinance? Assume the call premium is tax deductible