Second is the answer is correct (99% sure)
A : 100
b : 50
explanation : subtract 2b from both sides
10, because when you use a scientific calculator you get 10.09950494
which would be round to 10 because after the decimal the number is 0 below 5 so 10 stays as 10
Let's put them in order.
22, 23, 24, 30, 31, 33
Now find the middle of the numbers.
22, 23, 24 ║30, 31, 33
31-23
8
So the IQR is 8.