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On Friday nights, a television network airs four sitcoms and three dramas on a fixed schedule. These seven shows are the network's "Friday night line-up." The network conducted a study that determined how many people watch these shows among three groups: women, men, and overall. For each group, the seven shows were idenitified as either a drama or sitcom and ordered from most watched to least watched. Based on this information, determine if each set is well-defined. Write each set in the indicated form. If you need to use " " "to indicate a pattern, make sure to list at least four elements of the set. As you answer below, remember that the natural numbers are just the counting numbers. This means that 0 is not a natural number and negative (a) Descriptive form (b) Roster form: {5,6,7,x4,} Descriptive form: (Chonse one)