Hi could some help me to answer these questions very detailed.

1. Elaborate what the EV/EBITA ratio can at most be if interest cost for a company is 5% for the compnay to lessen its P/E ratio. Explain how it works.

2. Explain what matters most historically when it comes to returns and current interest rates? Why does that influence stock returns? This discussion must include some discussion of the earnings yield of stocks.