Let A = {a, b, {c, d}, e}. Which of the following are false and why ?
(i) {c, d} ⊂ A (ii) {c, d} ϵ A (iii){{c, d} ϵ A }
(iv) a ϵ A (v) a ⊂ A (vi) {a, b, e} ⊂ A
(vii) {a, b, e} ϵ A (viii) {a, b, c} ϵ A (ix) ϕ ϵ A (x) { ϕ } ⊂ A