Assume student's marks are sorted into circular doubly linked-list shown in Figure-1. A Head B C Figure-1 Circular doubly linked-list (a). Illustrate the advantages of using a doubly linked-list in comparison to other data structures like array and linked-list. [5 marks] #include using namespace std; class Node { public: (b).Demonstrate how to implement circular doubly linked-list in Figure-1 based on the following partial code: [10 marks]