If possible, name an object that is an element of both given sets. Then, if possible, na...

If possible, name an object that is an element of both given sets. Then, if possible, name an object that is an element of the first set but not of the second.

(a) {1, 16, 128} and the set of positive integer powers of 2

(b) {6, 42, 74} and the set of integer multiples of 6