3. The symbols ? and ? have different meanings. Can you tell the difference? In each case, determine if the given statement is true or false.
(a) a ? {a,b,c}
(b) a ? {a,b,c}
(c) {a} ? {a,b,c}
(d) {a} ? {a,b,c}
(e) Ć ? {a,b,c}
(f) Ć ? {a,b,c}
(g) {d,e} ? {d, e, {d}, {e}, {d, e}}
(h) {d,e} ? {d,e, {d}, {e}, {d, e}}
(i) {d, {d}} ? {d, e, {d}, {e}, {d,e}}
(j) {d, {d}} ? {d, e, {d}, {e}, {d, e}}