3. The following are the number of mails received in different days by different organizations: Days (x) : 23, 35, 38, 50, 34, 60, 41, 32, 53, 67. Number of mails (v) : 18, 40, 52, 45, 32, 55, 50, 48, 26, 25. 1) Fit a regression line of y on x. 11) Estimate y if x = 10. 111 Calculate correlation coefficient of x and y and test the significance of correlation