You are an intern, working with the statistical expert tasked with completing the study for the bank. She is interested in your thoughts on the project, and has asked you to write up your answers to the following questions, devoting a short paragraph to each question.

1. Identify the sampling method (Cluster, Simple Random Sample, Stratified Random Sample, Convenience, etc.) that would best ensure that your sample would reflect the overall population of branch customers. Briefly explain your reasoning.
2. If the banks population is comprised of 2500 local customers, how many do you think would be good to survey?