Describe the following sets in Roster form:

Describe the following sets in Roster form:

(i) {x : x is a letter before e in the English alphabet};

(ii) {x ∈ N : x2 < 25};

(iii) {x ∈ N : x is a prime number, 10 < x < 20};

(iv) {x ∈ N : x = 2n, n ∈ N};

(v) {x ∈ R : x > x}.

(vi) {x : x is a prime number which is a divisor of 60}

(vii) {x : x is a two digit number such that the sum of its digits is 8}

(viii) The set of all letters in the word 'Trigonometry'

(ix) The set of all letters in the word 'Better'.