$2$A$)$ Write user defined functions to perform the following operations on circular singly linked list:

i$)$ Print repeated elements in the given list.

ii$)$ Right shift the list A counter clockwise for a given value of $k.$

For example: $102030405060$ NULL and $k=3,$ then $4050$

$60102030$ NULL $($Do not use array or stacks or queues$)$

$2$B$)$ A book shop maintains the inventory of books that are being sold at the shop. The list includes

details such as author, bookld, title, price, publisher, and stock position. Whenever a customer wants

a book, the salesperson inputs the bookld and the system searches the list and displays whether it is

available or not. If it is not available, appropriate message is displayed. If it is available, then the

system displays the book details and requests for the number of copies required. If the requested

copies are available, the total cost of the requested copies is displayed, otherwise the message

"Required copies not in stock" is displayed.

Write a suitable class definition with Book as class name with suitable data members and member

functions.

$2$C$)$ Illustrate the conversion of the below infix expression to postfix expression, clearly showing the stack

operations.

$\frac{A}{B}+(\frac{C}{D}{)}^{*}(E-F{)}^{**}\frac{\frac{H}{J}}{K^{*}(L)}$