Help solve this problem please

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

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

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20