4} A simple random sample of 150 beer drinkers is selected. After tasting each beer, the individuals in the sample are asked to state their preference or first choice. The below table provides sample results for beer preferences of male and female beer drinkers. Beer Preference Gender Light Regular Dark Total Male 20 40 20 80 Female 30 30 10 7O 30 150 b} Find a 95% condence interval for the difference in the proportion of female drinkers who prefer light beer and the female drinkers who prefer dark beer