Let U represent the set of people in a certain community who were asked if they subscribe to an information source.Let D ={ x ∈ U | x subscribes to The Daily Informer }andN ={ x ∈ U | x subscribes to News Magazine }(Assume these sets are not disjoint.) Write the set that represents the set of people surveyed who subscribe to exactly one of the two news sources given.a) N ∪ Db) ( N c ∩ D ) ∪ ( N ∩ D c )c) N c ∩ Dd) ( N ∩ D )ce) ( N c ∪ D ) ∩ ( N ∪ D c )