Fast solve for x on #4 and find all vertical angles on #3

Acompany is testing in comparing to lightbulb designs the box plot shows the number of hours that each lightbulb design last before burning out which statement is best supported by the information of the plot

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

4+(2+x) can you me solve this problem