variable of interest

b] A group of health physicians wishes to conduct a study on factors affecting heart problems in young trained athletes. The young patients are divided into three types of problems; fatigue [10(1), last or irregular heartbeat {50} and chest pain {30}. To carry out the study. the physicians select a random sample ot 50 young athletes proportionately. E} State the population and sample for the above study. [2 marks} ii} State the variable of interest and the scale of measurement for the above study. (2 marks} iii} Name the sampling technique used in the study. Briefly explain how the sample will be selected using thls technique. (4 marks} iv} State the most suitable data collection method to be used for the study. {1 mark}