H = {x : x is a divisor of 18} 5. If S = {square, rectangle, circle, rhombus, triangle, list the elements
of the following subsets of S.
(i) The set of shapes which have 4 equal sides.
(ii) The set of shapes which have no sides.
(iii) The set of shapes in which the sum of all interior angles is 180°
6. If A = {a, b,c}, list all the subsets of A.
15