Question: 1. Show that N has the same cardinality as Z.
2. Show that Z has the same cardinality as 2Z.
3. Show that N has the same cardinality as Z×Z.
4. Suppose that the additional eight samples brought into Storage just after the Protagonist leaves the sample are placed into drawers with numbers higher than 59. What would happen to the Protagonist's tag number later in the play?