What are the four fundamentals in sales and operations planning? (4 markah/marks) b) Explain the relationship of different functional areas within an organization that are involve in Sales and Operations Planning activity of the organization’s Manufacturing Planning and Control. Give example to illustrate your explanation. (8 markah/marks) c) Material Requirement Planning activity is considered as the “engine” in the Manufacturing Planning and Control System framework. Discuss two advantages of an effective use of a Material Requirement Planning system.