The following is a list of ages of all those currently employed at Echo Systems 16 17 18 18 18 18 19 19 20 22 22 22 23 23 25 25 29 31 32 33 35 35 37 37 38 38 38 40 40 40 43 44 45 45 45 46 46 47 48 48 50 50 53 60 61 54 55 56 56 57 58 59 This can be considered population data. Use this information to answer the questions below. For full marks your answer should be accurate to at least two decimal places. Note: For this question you can copy and paste the data into a spreadsheet application. a) Calculate the population mean population mean = 0 b) Calculate the population variance population variance = 0 c) Calculate the population standard deviation population standard deviation = 0