2. The college bookstore tells prospective students that the average cost of its textbooks is $52 with a standard deviation of $4.50. A group of smart statistics students thinks that the average cost is higher. In order to test the bookstore's claim against their alternative, the students will select a random sample of size 100. Assume that the mean from their random sample is $54.80. Perform a hypothesis test at the 5% level of significance (z critical = +/- 1.96) and state whether we accept or reject the null hypothesis.