All molecules left before minute 5.
We follow four individually labeled molecules and record the minute ti when molecule I leaves the cell. For example, if ti = 1, t2 = 3, t3 = 6, and t4 = 2, the first molecule left during minute 1, the second left during minute 3, the third left during minute 6, and the fourth left during minute 2. Give three simple events that are included in the above event.