4th year credit distribution

Hi seniors! I need help understanding the 4 th year credits distribution for cse core.

Is it mandatory that each sem must have a minimum of 16 credits? Even in 4th year?

What if you completed most of your credits in previous sems and have less than 32 credits in the 4th year?

What if the 4th year compulsories? Project 1, Project 2 and Summer Intership?

Also is the 14 credit one sem internship still valid?