population, variable of interest, sampling technique used and most suitable data collection method

b) A group of health physicians wishes to conduct a study on factors aecting heart problems in young trained athletes. The young patients are divided into three types of problems; fatigue (10D). fast or irregular heartbeat {50) and chest pain {30}. To carry out the study. the physicians select a random sample of 50 young athletes proportionately. ii 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 this technique. {4 marks) hr) State the most suitable data collection method to be usad for the study. (1 mark)