please answer all three parts of the question and pick a multiple choice answer

Tomorrow your firm will issue 30K one-year zero-coupon bonds outstanding priced at $800 per bond. The bonds have a face value of $900. If the firm doos not default, it can fully repay the bonds. If the firm defaults, the value of assets will equal $25M and the firm will pay $3M in bankruptcy costs. What is the promised rate of return on those bonds? O 0.25 0.11 0.13 If the expected return on these bonds equals 6 percent, what is the probability of default implied by bond's expected return? 0.50 0.31 0.72 Suppose that probability of default becomes 40 percent, what would be the expected return on these bonds? 0.06 0.04 0.02