List the elements in the set A = {x Element R: x^2 = 1} where R is the set of real numbers List the elements in the set A = {x Element N;.x^2 = 1} where N is the set of positive integers Let A = {1.2.3} List all the subsets of A. (Set of all subsets is called the Power Set) Define the Cartesian Product; A times B = {(a, b):a Element A b Element B} Let A = {1.2, 3} and B = {a.b} List all elements in A times B