--Answer--
1. 4
2. 6
3. 14
4. 9
5. 10
6. A
7. 20
--Explanation--
1. The lower quartile is always the left side of the box.
2. The IQR is Quartile 1 minus Quartile 2, so you could subtract the number at the right of the box with the left.
3. The range is the highest number minus the lowest number. (The numbers that stretch out all the way til the lines stop)
4. The median is the line in the middle of the box.
5. The upper quartile is right of the box. (the vertical line)
6. The Lower Quartile Is Always Smaller Than The Upper Quartile.
7. The number all the way to the right of the number line.
Sorry if anything is incorrect, but I hope it helps :>