Computer games in which the players take the roles of characters are very popular. They go back to earlier tabletop games such E as Dungeons & Dragons. These games use many different types of dice. A four$-$sided die has faces with one of the numbers $1,2,3,$ and $4$ appearing at the bottom of each visible face.

$($a$)$ Follow the example of the sample space for rolling two six$-$sided dice.

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