You are the researcher of a retail chain that has 100 convenience stores in Canada. The CEOs of the retail chain asks you: Would using technology to cashiers, cash registers and checkout counters bring higher profits? Please respond to the CEOs with the three questions to address / three steps to make with regard to business experiments. Explain the trade-off between internal and external validity. Please operationalise the concept of customer satisfaction with 3 dimensions and 2 elements/ dimension. Design a questionnaire on customer satisfaction with the retail chain with 8 close-ended questions