write code in c++ with only linked list allowed

Fast Nuces Karachi has installed a Robo Accountant at Onestop. It can deal with a maximum of 15 students at a time. Students are supposed to make a queue to get all services one at a time. You are required to program its fee challan generation function. The services process in the following way: - First, Robo will generate a pin_code for all students after asking for their NU-ID. - Second, students will enter the generated pin_code to get a fee challan: for the program, the fee of the student on the fee challan is the sum of NU-ID digits. - Last, every student will pay the fee of the person before him/her in the queue. Hint: for payment, the student must know the ID of the student behind him/her in the queue. Best of Luck