Let S = {1,2,3,...,18,19,20} be the universal set. Let sets A and B be subsets of S, where: Set A = { 2 , 3 , 6 , 13 , 16 , 17 , 20 } A = { 2 , 3 , 6 , 13 , 16 , 17 , 20 } Set B = { 1 , 2 , 3 , 4 , 8 , 11 , 12 , 13 , 15 , 17 , 18 , 19 , 20 } B = { 1 , 2 , 3 , 4 , 8 , 11 , 12 , 13 , 15 , 17 , 18 , 19 , 20 } LIST the elements in Set A and Set B: { } LIST the elements in Set A or Set B: { } Enter the elements as a list, separated by commas. If the result is the empty set, enter DNE