My friend is taking a 2-year accounting diploma full time program at Seneca College. He already withdrawn from the summer semester before the 10th day of classes. As of today, he wants to take Seneca's part-time course equivalents. He has already submitted withdrawal from full time program TODAY. My friend has four questions:

a. Is he still able to drop the full time program in time for the fall term? When is the due date for this?

b. Will he have to pay the $500 tuition deposit fee, despite this Friday being the deadline?

c. What happens if he doesn't pay the $500 tuition deposit fee by this Friday?

d. Can my friend always switch back to full time?