A Director of Human Resources is exploring employee absenteeism at the INCOVA Hospital. A multiple linear regression analysis was performed using the following variables. The results are presented below. Variable Description Y number of days absent last fiscal year x1 commuting distance (in miles) x2 employee's age (in years) x3 length of employment at PPP (in years) Coefficients Standard Error t Statistic p-value Intercept 6.594146 3.273005 2.014707 0.047671 x1 -0.18019 0.141949 -1.26939 0.208391 X2 0.268156 0.260643 1.028828 0.307005 x3 -2.31068 0.962056 -2.40182 0.018896 R=0.498191 R2=0.248194 Adj R2=0.192089 se = 3.553858 n = 73 What is the regression equation based on this analysis? O a. Y = 0.18 x1 + 0.27 x2 -0.51 x3 O b. Y = 6.59 - 0.18 x1 + 0.27 x2 c. Y = 6.59 - 0.18 x1 + 0.27 x2 - 2.31x3 O d. None of the above