Position Budgeting and Position Control

Hi ,

I would like to know once we enter the Position Budget Amount in the application,automatically it will go for any account for budgeting or we do have to mention the account?

 Do we enter any information on the "Activity by Position" or automatically the screen populates the data? What is "Activity by Position".

What is the difference  between Position Status and Budget Status.

What is the meaning of Business Unit -Parent and Parent Position ID.

Do we have to mention the account in the Position Account info for posting it to GL? or it will take the amount automatically into GL?