The following table shows the predicted and the actual sales of a firm in the quarters of a year. Quarter Predicated Sales (in dollars) Actual Sales (in dollars) 1 20 19 2 22 20 3 24 21 4 28 26 Table 4.1 Calculate the sum of squared errors of the observations from Table 4-1. Question 21 options: 1) 20 2) 34 3) 18 4) 22 5) 15