Taking the set of natural numbers as the universal set, write down the complements of the following sets: (i) {x: x is an even natural number} (ii) {x: x is an odd natural number} (iii) {x: x is a positive multiple of 3} (iv) {x: x is a prime number} (v) {x: x is a natural number divisible by 3 and 5} (vi) {x: x is a perfect square} (vii) {x: x is perfect cube} (viii) {x: x + 5 = 8} (ix) {x: 2x + 5 = 9} (x) {x: x ≥ 7} (xi) {x: x N and 2x + 1 > 10}