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Using 50 observations, the following regression output is obtained from estimating y = Bo + $1x + Byd1 + Bad2 + e. Standard Coefficients Error t Stat p-value Intercept -0. 42 0 . 25 -1. 68 0 . 0997 X 3.52 1 . 10 3.20 0 . 0025 d1 -13.20 17 . 60 -0. 75 0 . 4571 7.55 2.50 3. 02 0 . 0041 a. Compute V for x = 200, dj = 1, and d2 = 0; compute for x = 200, dj = 0, and d2 = 1. (Round your answers to 2 decimal places.) x = 200, dj = 1 and d2 x = 200, dj = 0 and d2 = 1 b-1. Interpret dj and d2. (You may select more thantone answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes lef with a question mark will be automatically graded as incorrect.) When d1 = 1, y is 13.20 units greater than when d1 = 0, holding everything else constant. When d2 = 1, 9 is 7.55 units greater than when d2 = 0, holding everything else constant. When d1 = 1, ) is 13.20 units less than when d1 = 0, holding everything else constant. When d2 = 1, y is 7.55 units less when d2 = 0, holding everything else constant. b-2. Are both dummy variables individually significant at the 5% level? Yes, both dummy variables are individually significant at the 5% level. No, none of the dummy variables are individually significant at 5% level. No, only the dummy variable dj is significant at 5% level. No, only the dummy variable d2 is significant at 5% level