Answer please ? (4th question )
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1) {a} and { } are the subset of 1st
2) {a} {b} { } and {a,b} are the subset of 2nd
3) { 1} {2 } { 3} { 1,2} { 1,3} {2,3 } {1,2,3 } are the subset of 3rd
4) is empty set so it is subset of itself
2) {a} {b} { } and {a,b} are the subset of 2nd
3) { 1} {2 } { 3} { 1,2} { 1,3} {2,3 } {1,2,3 } are the subset of 3rd
4) is empty set so it is subset of itself
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