Question 1 How should a corporation attempt to achieve synergy among functions a

Question 1
How should a corporation attempt to achieve synergy among functions and business units?
Question 2
How is the cellular/modular structure different from the network structure?
Question 3
How can corporate culture be changed?
Question 4
When should someone from outside a company be hired to manage the company or one of its business units?
Refrences required.