Consider the quadratic expression x2+kx+24, where k is an integer.
(i) List all possible ordered pairs of integers (r,s) whose product is 24.
(ii) For each pair (r,s) obtained in part (i), write the corresponding value of k and the factorised form of x2+kx+24.
(iii) Hence, determine all integer values of k for which x2+kx+24 can be expressed as a product of two linear factors with integer coefficients.