Hi- Hopefully you can elaborate more on the following questions with samples i can understand. how to define net exports and net capital outflow?

Hi-

Hopefully you can elaborate more on the following questions with samples i can understand.

1. how to define net exports and net capital outflow? What is it and its purpose, how is it used.

2. Explain the relationship among saving, investment, and net capital outflow.

3. Describe the economic logic behind the theory of purchasing-power parity?

Thank you for your help