7. The management of a popular Chinese restaurant in Windsor claims that it can prepare and deliver a meal in less than 30 minutes of placing the order, on average. An experiment was conducted using 16 customers. The average time it took to prepare and deliver a meal to these 16 customers was 26.4 minutes. Suppose the time it takes to prepare and deliver a meal is normally distributed with a population standard deviation of 6 minutes. a. At the 0.04 level of significance, is there sufficient evidence to indicate that the management's claim is true? To answer this question properly, complete the following four steps: Step 1: State the hypotheses Step 2: Find the rejection region and state the decision rule Step 3: Calculate the test statistic value Step 4: State your conclusion b. Calculate the p-value of this test.