The two endpoints of a segment are at $(1,4)$ and $(1,10)$. What is the sum of the coordinates of the midpoint of the segment?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here