If anybody thinks they know what I’m supposed to do, can you please tell me. Or solve it for me.

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

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Can someone me with these two circle theorem questions asap?