GA Q4

A student needs to enroll for a minimum of $60$ credits. A student cannot enroll for more than $70$ credits. The credits are divided amongst project and three distinct sets of courses namely, core courses, specialization courses, and elective courses. It is compulsory for a student to enroll for exactly $15$ credits of core courses and exactly $20$ credits of project. In addition, a student has to enroll for a minimum of $10$ credits of specialization courses. The maximum credits of elective courses that a student can enroll for is $\_\_\_\_$