Answer:
The first quartile is the part where the left box first starts.
Step-by-step explanation:
On the far left of the box and whiskers plot, there is a line that represents the minimum value. The left side of the box is the lower quartile (Q1). Where the left side of the box first starts, it should line up with a number on the number line below it. You follow the side of the left box's beginning point down to the number underneath it, and you will get your answer.
I don't see a picture of the problem, so I can't really help you more than this. Anyway, I hope that this explanation did help at least a little!
Good luck!