I need help with the following:

1. Explain the rule a firm uses to determine the appropriate combination of capital and labor resources to use in order to maximize profits. How is this different from the firm's least- cost combination of resources?
2. Explain the difference between the three types of mergers. Which types of mergers are the Department of Justice most likely to oppose? Why?
3. How does a company decide how much to pay an employee and how many employees to hire? What are the two factors internal to the firm that would increase how much a company would pay an employee?