I need help answer these questions. Thank you!

Suppose an investment bank is buying $60 million in long-term mortgage-backed securities and finances the investment by borrowing 75% and paying for the other 25% out of equity. What is the bank's return on its equity investment if the value of the mortgage-backed securities decreases by 20% during the year after they are purchased? Question 8 (1 point) As the economy adjusts in the long run to an increase in the labor force participation rate, the level of interest rates will ______ and investment in new plant and equipment will ______