Write the following in roster from:
(i) The set of all the solutions `x^(2) -7x+6=0`
(ii) The set of all the solutions of `(x-1)(x+8) =0`
(iii) The set of all natural numbers x such that `4x+18 lt25`
(iv) The set of all natural numbers x such that `4x+18lt25`

Explanation

(i) {1,6}
(ii) {1,-8}
(iii) {1,2,3,4.....12}
(iv) {1}