7(a) Identify the use cases in the following problem description and represent them is a UML use case diagram.

Provide a text description of the USE cases.

A student may register for courses at the start of a semester.To register, a student must first select the questions he wants to credit.The System will check for any possible schedule conflicts among the selected courses and may require to student to change his course selection. When there is no schedule conflicts, the student can save the registration data.The student then needs to see his advisor.The advisor must appove each course that the student has seletected. If the advisor approves the courses, then he would need to click on an OK button near the student's name.A bill for the registered courses will then print in the academic section..The student should proceed to pick it up.