1 5 pts The following data gives the prices of seven textbooks randomly selected from a university bookstore. $89 $170 $104 $113 $56 $161 $147 Find the mean, standard deviation, and variance of the data. Round to the nearest penny. Be sure you are utilizing the correct symbol for your answer. In the boxes that do not apply, type N/A. Notes: For the units on Variance, write dollars-squared. For the units on Mean and Standard Deviation, write $## NOT ##$. Units Required Work: L1: textbook prices Calculator Function: L1 Mean: mu = top enclose x = Standard Deviation: sigma = s = Variance: sigma squared = s squared =