Let the universal set u = {a, b, c, d} with sets a = {a, b} and b = {b, c}. find the set a ∪ bc. which of the sets below are disjoint to this set? (select all that apply.)[hint: for each of the sets below, find the elements of the set and compare to the set a ∪ bc in order to determine if they are disjoint.]a) a ∩ bb) a ∩ b^cc) a^c ∩ bd) a ∪ be) a ∪ b^cf) a^c ∪ bg) a^c ∩ b^ch) a^c ∪ b^ci) none are disjoint