please answer the questions. the case2 mentioned is the above case2 I attached. Thx!

Example of case 2: Consider a single period binominal setting where the risk less interest rate is zero, and there are no taxes. A firm consists of a machine that will produce cash flows of $ 210 if the economy is good and $ 80 if the economy is bad. The good and outstanding and debt with a face value of $50 due at the end of the period. Suppose the firm above unexpectedly announcesta wi h the same seniority as existing debt and a face value $50. The firm will use the entire proceeds to repurchase some of the outstanding shares. ill issue additional debt, wit