Rate of change of the graph

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

Add the fractions and simplify 1/2+ 1/3

What is the factored form of the following expressions? d^2 – 13d + 36