15) Given a universal set E that is the set of all the hexadecimal digits, and sets X and Y,such that \varepsilon=\{0,1,2,3,4,5,6,7,8,9, a, b, c, d, e, f\} X 3 {1,2,4,6, а, с, а} Y=\{0,2,4,6,8, a, c, e\} list the elements of each of the following sets: \text { a) } \bar{X}\left(\text { or } X^{\prime}\right) \text { b) } \bar{X} \cup \bar{Y} \text { c) } X \cap Y \text { d) }(\bar{X} \cup \bar{Y}) \cup(X \cap Y) \text { e) }(\overline{X \cap Y}) \cap(\overline{\bar{X} \cup \bar{Y}})
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