c1 A. Discuss ant three of the four key service characteristics a company must consider when- designing marketing programs.Give one example for each of the three service characteristics. B. compare and contrast a conventional channel with a vertical marketing system.Desccribe the three different hypes of vertical marketing systems. t C2 A.Differentiate the concepts of customer needs ,wants and demands.Provide one situation to illstrate the three concepts. B.Discuss product lift-cycle strategies in details