I need a help to write two methods described below:

public Set complement(Set s) returns a Set object that contains the complement of the current set with respect to s.

Example: If the current Set = {1, 2, 8, 9} and s = {2, 3, 8} your method returns {1, 9} public Set union(Set s) returns a Set object that contains the union of the current s and Set s.

Example: If the current Set = {1, 2} and s = {2, 3} your method returns {1, 2, 3}