Which of the following is the best problem statement for this situation? a. you need to replace the quevision system equipment for your store in order to achieve an acceptable average checkout time. b. you need to replace the store’s quevision system and retrain your baggers and cashiers to provide faster checkout service. c. the quevision system in your store has determined average checkout time is excessive, resulting in poor customer service and upsetting baggers and cashiers, which could lead to a loss of customers and employees. d. your store needs to cut its average checkout time by at least five and one-half minutes.