The closing stock price of a certain company for a sample of 10 trading days is shown below. Day Stock Price 1 57 2 60 3 57 4 61 5 58 6 63 74 8 66 65 10 69 For the sample, determine the following measures. (a) the mean (b) the median(c) the mode : (d) the variance (Round your answer to two decimal places.) E (e) the standard deviation (Round your answer to two decimal places.) : (f) the range