Correct Answer - (i) `phi,{a}`
(ii) ` phi, {a}, {b}, {a,b}`
(iii) `phi, {-2} , {3}, {-2,3}`
(iv) `phi, {-1,}, {0}, {1}, {-1,0}, {0,1},{-1,1} {-1,0,1}`
(v) `phi`
(vi) `phi, {2}, {{3}}, {2{3}}`
(vii) ` phi, {3}, {4}, {{5,6}}, {3,4} , {3, {5,6}}, {4,{5,6}}, {3,4,{5,6}}`