What is the answer to these questions

Statistics for Business Decisions (COMM 207) Class worksheet 7 Perform Chi-square hypothesis testing for problems I and 2 using a = 0.05. Problem 1: Suppose a store sells Brand A, Brand B and Store's own brand for a particular product. The store conduct a random experiment and collect data from 150 subjects. Consumer Preference Survey Brand A Brand B Store's own brand 61 53 36 a) Do the preferences for the brands vary? b) Are the preferences for Brand A and Brand B twice more than the preference for the Store's own brand