A cafe has been seeing a decline in the number of customers over the last three months. The manager understands that it is important to retain customers in order to enjoy long-term customer loyalty. He suspects that the decline in the number of customers is due to deterioration in the quality of customer service at the cafe. He commissions you as a consultant to help gauge customers' satisfaction with the quality of service at the cafe. Your finding will help the cafe to make better operational decisions. You are charged with the responsibility of developing a suitable research instrument that will help the cafe achieve its objectives.