Pls help who ever gives a correct answer will get a brainlist and 100 points!!!

The top right is 6, the top left is 4, the bottom left is 1, and bottom right is 13.
Answer:
top left= 4
bottom left= 1
top right= 6
bottom right= 13
Step-by-step explanation:
top left: 12-4=8 ,, 8/2= 4
bottom left: 6-4=2 ,, 2/2= 1
top right: 16-4=12 ,, 12/2= 6
bottom right: 30-4=26 ,, 26/2= 13