I know this is *technically* more than one question, but please help me out.

What is a budget? What is budgetary control?

Discuss some of the major reasons why companies prepare budgets.

Why is the sales forecast the starting point in budgeting?

How can budgeting assist a company in planning its workforce staffing levels? Provide an example

(preferably 150+ words, but it's okay if not. I'm just burned out)