Answer:
Median = 116.
First quartile = 102.
Explanation:
There is a total of 280 scores so the median will be the 140th score.
The first box gives 26 , second 34 = 60
The 3rd box contains 100 giving a total of 160 so the median lies in this third box.
140 - 26 - 34 = 80..
That gives a value of 80 / 5 = 16.
The median is 100 + 16 = 116.
The lower quartile is the 70th score
26 + 34 + 10 = 70.
So it is 100 + 10/5 = 102.