A B 1 sales prices 2 82 3.7 3 80 4 A 79 4.1 5 81 3.7 6 82 3.6 78 4.3 82 3.7 78 4.4 10 81 3.9 11 80 4.1 12 83 3.2 13 79 4.1 14 81 3.9 15 80 4.1 16 82 3.7 17 81 3.9 18 77 4.5 19 80 4 20 80 4.1 21 79 4.2 22 80 3.9 23 80 4.1 24 78 4.4 25 81 3.8 26 79 4.2 27 80 4 28 83 3.2 29 80 4 30 77 4.5 31 77 4.61. A company sets different prices for a particular DVD system in 30 different regions of the country. DVDsale.csv file shows the number of units sold and the corresponding prices (in dollars). a. Computer the mean sales and mean price in this dataset. b. What is the sample standard derivation of the sales and prices? c. What is covariance between sales and price? d. What is the coefficient of correlation between sales and price? . What are the regression coefficients bo, by? f. How to interpret the two coefficients? g. If the firm set the price at $4.75, what is the expected sales based on the estimated simple linear regression model