The manager of a child care facility finds that he has four things to do$,$ but not enough time that day to do them all. Using Stephen Covey's system for arranging priorities, he decides that $1)$ editing the month's newsletter is important but not urgent, $2)$ replacing defective smoke detector is both important and urgent $3)$ responding to the application for future openings is urgent but not important and $4)$ reorganizing the filing cabinet of applications is neither urgent nor important. Which one should he do first?

replace the smoke detector

reorganize the filing cabinets

edit the newsletter

respond to the applications