Let `A ={1,2,{3,4},5}`. Which of the following statements are incorrect and why ?
(i) `{3,4} subA`
(ii) `{3,4} in A`
(iii) `{{3,4}}sub A`
(iv) `1 in A`
(v) `1 sub A`
(vi) `{1,2,5} sub A`
(vii) `{1,2,5} in A`
(viii) `{1,2,3} sub A`
(ix) `phi in A`
(x) `phi sub A`
(xi) `{phi} sub A`.