Write the set in the set-builder form.

Write the set of all vowels in the English alphabet which precede q.

Write the set of all positive integers whose cube is odd.

Which of the following are examples of empty set?

(i) Set of all even natural numbers divisible by 5.

(ii) Set of all even prime numbers.

(iii) {x:x²–2=0 and x is rational}.

(iv) {x:x is a natural number, x < 8 and simultaneously x > 12}.

(v) {x:x is a point common to any two parallel lines}.

Which of the following sets are finite and which are infinite?

(i) Set of concentric circles in a plane.

(ii) Set of letters of the English Alphabets.

(iii) {x ∈ N : x > 5}

(iv) {x ∈ N : x < 200}

(v) {x ∈ Z: x < 5}

(vi) {x ∈ R:0 < x < 1}.