Answer:
Ok, so I think I may have got it right.
Explanation:
So in each row going left to right is the following numbers
1st row: 2, 3, 4, 5
2nd row: 3, 4, 5, 6
3rd row: 4, 5, 6, 7
4th row: 5, 6, 7, 8
b) 1/16
c) 6/16
I'm not exactly sure if I got everything right, but I hope this helps :)