Can u please solve and explain it clearly?

For a single lecture hall, the following meetings are proposed: My start time: 1, finish time: 3 M, start time: 0, finish time: 6 M3 start time: 3, finish time: 5 MA start time: 5, finish time: 7 M5 start time: 7finish time 8 M6 start time: 6, finish time 9 The maximum number of meetings that can be scheduled is: Suppose My must be scheduled, what is the maximum number of additional lectures that can be scheduled? Suppose the scheduling problem is over two rather than one lecture hall. Which of the following statements is true: All lectures can be scheduled using two lecture halls At least three halls are needed to schedule all lectures There is a schedule that allows M. and Me to be scheduled in the same lecture hall The optimal schedule allows 3 lectures in each hall