Let A, B, and C be three events. Match, where possible, events D1 through D10 with events E1 through E11. Matching means that the events are exactly the same; that is, if one occurs, so must the other and conversely (see the Definition 1.3.2). (Hint: Draw a Venn diagram for each event D1, ...,D10, do the same for events E1, ...,E11, and then compare the diagrams.)