Discuss the factors that make the president a national symbol and the power that flows from that symbolic role.

those three questions are final exam questions. please answer each of them individually with adequate answers. each answer in a page.
1- Discuss the factors that make the president a national symbol and the power that flows from that symbolic role.
2- Discuss the role of the president in Decision making and crisis management.
3- Discuss the role of the president in foreign and military policy.