According to a newspaper article, an average American consumes 28 pounds of French Fries per year. Suppose that you believe that the average is not 28 pounds. You randomly survey 50 people. The sample average is 25 pounds. Prior studies show that population standard deviation is 10 pounds. Conduct an appropriate hypothesis test at 5% significance level (show your null and alternative hypotheses, z-score calculation, critical value from z-score table, p-value of your test statistic and your conclusion).