Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? 

(i) {3, 4}⊂ A 

(ii) {3, 4}}∈ A

(iii) {{3, 4}}⊂ A 

(iv) 1∈ A 

(v) 1⊂ A 

(vi) {1, 2, 5} ⊂ A 

(vii) {1, 2, 5} ∈ A 

 (viii) {1, 2, 3} ⊂ A 

(ix) Φ ∈ A 

(x) Φ ⊂ A 

(xi) {Φ} ⊂ A 

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