The following frequency distribution shows the number of years of service for employees of the Alpha Corporation: Class Frequency Limits (Number (years of of service) employees) 1-5 5 6-10 20 11-15 25 16-20 10 21-25 5 26-30 3 Calculate each of the following: A. Mean B. Median C. Mode D. Standard Deviation E. Variance F. Class Boundaries G. Write a sentence explaining what type of graph/chart you would use to present this data. Explain why