2. Linear Doubly Linked Lists can be used as a stack data structure in the following way: - When the stack is emply the top pointer is assigned to NULL. - At any timg the top pointer points the rightmost element in the stack. - The following diagram summarizes the possible cases: (a) (%3) Introduce a suitable data structure to represent each node containing Medical Data of patients in the stack. The Medical Data of a patient contains the name, the age and the number of operations a person had in his/her life. (b) (%12) Write the definition of the functions Push and Pop to be used in such a stack architecture (c) (%10) Write the definition of a function, Stackbisplay, to display the names of the patients having their Medical data in the stack