In each of the following cases, given reasons to show that the construction of △ ABC is not possible:
(i) AB = 6cm, ∠A = 40 and (BC + AC) = 5.8cm
(ii) AB = 7cm, ∠A = 50 and (BC – AC) = 8cm
(iii) BC = 5cm, ∠B = 80, ∠C = 50 and ∠A = 60
(iv) AB = 4cm, BC = 3cm and AC = 7cm.