Coefficient of Skewness and Coefficient of Variation for Grouped Data

"1. For branch city calculate the mean and median minutes spent commuting for this week. 2. For each branch calculate the variance and standard deviation of minutes spent commuting. 3. Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us? Calculate the 10th and 90th percentile for the number of minutes spent commuting for employees from Branch A and Branch B, respectively. "