1- plz explain the below definitions with clarifying the importance of it

- The forecasted cash flows

- exchange rate

- interest rate

2- explain the difference between using US dollars $ and Eero from investor, and accounting view, explain and give example about it.

3- the difference (advantages and disadvantages) between euro countries and other countries?

4- how the interest rate play important role in bringing investment?

Please explain your answer in detail,