For the first one number 1,2 and 3 are prime cause it can only be times 1, and 4 is a composite because it is not prime it can be times not only by 1 but by 2 two do you understand it more now or do you need help still
I believe the answer is 20 sorry
Step-by-step explanation:
(A) you takeway 24 by 2 and add 6=28
Hope this helps if not i'm sorry