Fig. 6

Concavity of \(A{P_c}\)w.r.t. selling price\(\left( {{s_p}} \right)\) and warranty period \(\left( {{t_w}} \right)\) of Example-4.

Concavity of \(A{P_c}\)w.r.t. selling price\(\left( {{s_p}} \right)\) and warranty period \(\left( {{t_w}} \right)\) of Example-4.