1. U = {1,2,3,4,5,6,7,8,9}, A = {1,2,3,4,5,6}, B = {1,2,3} and C = {1,2}, represent C Ì B, B Ì A and A Ì U in Venn diagram.

2. U = {a,b,c,d,e,f,g,h,i,j}, A = {a,b,c,d,e,f}, B = {a,b,c} and C = {a}, represent C Ì B, B Ì A and A Ì U in Venn diagram.