(a) A survey at a Silver Sereen Cinemas (SSC) shows the selection of snacks purchased by movie goers. Test at α=0.05, whether there is any association between gender and snacks chosen by SSC customers. (b) A researcher wishes to test the claim that the average cost of buying a condominium in Cyberjaya, Selangor is greater than RM 480,000. The researeher selects a random sample of 70 condominiums in Cyberjaya and finds the mean to be RM 530,000 . The population standard deviation is to be RM 75,250 . Test at 1% signifieance level whether the claim is true. (c) It has been found that 30% of all enrolled college and university students in the Malaysia are postgraduates. A random sample of 800 enrolled college and university students in a particular state revealed that 170 of them were undergraduates. At α=0.05, is there sufficient evidence to conclude that the proportion differs from the national percentage?