A Marketing Manager of an adult male shampoo product company wants to conduct a survey of consumer and non- consumer preferences for its products in a city that has three districts. The city has a population as shown in the table below. Age Range Gender District X District Y District Z 0 - 5 tahun Male 130 100 70 Female 120 90 100 6 - 15 tahun Male 150 170 200 Female 140 200 180 16 - 30 tahun Male 700 500 Female 150 31 - 50 tahun Male 450 400 500 Female 500 450 450 AGE > 50 tahun Male 200 150 250 Female 180 100 150 Total 3050 3160 2950 Using the Slovin, Cochran, Isaac & Michael formulas, please estimates how many sample for each adult age group in each district if the desired margin of error for this survey is + 4%. After getting the number of samples, which formula will you choose? Please explain completely and clearly