(a)Explain in detail why the population formula for choosing a random sample will only be reliable for analyzing ahomogenous population(5 marks). [HINT:An example of aheterogenous populationof computer systems would be a group of 100 computers of which 10 of the machines are web server computers but the other 90 computers are laptops.] (b) The worked example of the mathematical formula shown above indicates that - from a population of10,000entities - a sample size of370is adequate. What would be the minimum sample size for a population of20,000? Please show "working" for your