1. As the Manager of Customer service at a Bank, you were assigned the job of revamping the Customer Service function at the branches. To get the project started, a research study at four branches was conducted to assess the effectiveness of a recent change in the customer account management process. Details of the study are as follows: - A group of customers from each of the four branches were selected randomly and invited to participate in the study. - Personal deposit and loan balances from these customers were extracted from the Baniss databases before the change took place. - Personal deposit and loan balances from these customers were also extracted from the Bank two months after the change - A simple survey was conducted to ask the customers involved about their experiences with the change. A few variables from the survey were recorded and appended to the extracted deposit and loan file. The attached Excel workbook, BUSI1013 Blank Dataset.xIsx, contains the data collected from the research study. (32 Points total; Part a.-d. 4 Poin Oach, Part e. and f. 8 Points each) Answer the following questions using this data set. a. What would the population of interest be for this study? b. Which method of sampling was used in this study? c. How big is the sample size? d. How many variables are in the data set? e. Which of the variables are categorical? f. Which of the variables are numerical