please help me understand these finance questions

Question 5, Problem 8-6 E Homework: 4-1 MyLab HW Score: 38.7%, 12.38 of 32 algorithmic Homework points Part 1 of 8 Points: 0 of 4 Save O'Reilly and CB Solutions. Heather O'Reilly, the treasurer of CB Solutions, believes interest rates are going to rise, so she wants to swap her future floating-rate interest payments for fixed rates. Presently, she is paying LIBOR + 2.00% per annum on $5,100,000 of debt for the next two years, with payments due semiannually. LIBOR is currently 4.02% per annum. Heather has just made an interest payment today, so the next payment is due six months from now. Heather finds that she can swap her current floating-rate payments for fixed payments of 7.002% per annum. (CB Solutions' weighted average cost of capital is 12%, which Heather calculates to be 6% per 6-month period, compounded semiannually). a. If LIBOR rises at the rate of 50 basis points per 6-month period, starting tomorrow, how much does Heather save or cost her company by making this swap? b. If LIBOR falls at the rate of 25 basis points per 6-month period, starting tomorrow, how much does Heather save or cost her company by making this swap? a. If LIBOR rises at the rate of 50 basis points per 6-month period, starting tomorrow, how much does Heather save or cost her company by making this swap? The swap for the first six-month period is $ . (Select from the drop-down menu and round to the nearest dollar.) cost savings