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4. (10 pts) A company claims to have 12 grams of alcohol in its canned beer. From how some of your friends were behaving at the gathering last night, you suspect that there is more than 12 grams in each can. Assuming the amount of alcohol is normally distributed, we sample 6 beers and find that the amount of alcohol in each was 11.4, 10.9, 12.1, 11.6, 12.2, 11.9 grams. Test the null hypothesis that u = 12 against the alternative u > 12 at the .05 level of significance