B. Identify the type of sampling technique used by the researcher in each of the following situations: (simple random sampling, systematics random sampling, stratified random sampling, or cluster random sampling) 1. Every seventh customer entering a shopping mall is asked to select his or her favorite store. 2. Nursing supervisors are selected using random numbers in order to determine annual salaries. 3. In a recent research that was conducted in a private school, the subjects of the study were selected by using the Table of Random numbers. 4. A teacher conducted a study in her school to determine who were better in mathematics: the boys or the girls. 5. A researcher who is studying the effects of educational attainment on promotion conducted a survey of 50 randomly selected workers from each of these categories: high school graduate, with undergraduate degrees, with master's degree, and with doctoral degree