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QUESTION 1 A researcher is interested to study the E-wallet usage among customers of Pasaraya Intan Belian. The researcher intended to obtain information from 50 respondents by interviewing every 5" customer of Pasaraya Intan Belian on a particular day. The respondents are asked on their marital status, age, the frequency of using E-wallet (never, seldom, often, very often), the preferred E-wallet provider (Boast, Grabpay, Touch n Go, BigPay) and the last E- wallet transaction amount (RM). a) State the population and the sample of the study. (2 marks) b) Identify THREE (3) variables from the study. Hence, state its scales of measurement. (3 marks) c) Identify the sampling method used. (1 mark) d) Give ONE (1) advantage of the data collection method used by the researcher. (1 mark)