Can someone help me answer these midterm questions for Econ 140: Econometrics. Thank you!

ECN140 Midterm II 2019 Winter 6. In this question, you have the following Stata output. . use "WAGE1 . DTA" gen educsq = educ*2 reg wage educ educsq exper Source | SS df MS Number of obs 526 F (3, 522) 59 . 12 Model | 1815. 84314 3 605 . 281048 Prob > F 0. 0000 Residual | 5344. 57115 522 10.238642 R-squared 0. 2536 Adj R-squared 0. 2493 Total | 7160.41429 525 13. 6388844 Root MSE 3. 1998 wage | Coef. Std. Err. t P> Itl [95% Conf. Interval] educ | -. 3837791 . 2365292 -1. 62 0. 105 -. 8484451 . 0808869 educsq . 0436347 . 0097853 4.46 0.000 0244112 0628582 exper . 0656694 . 0108302 6.06 0. 000 . 0443932 0869456 _cons | 2.379455 1. 497154 1.59 0. 113 - . 5617323 5. 320642 (a) (10 points) Based on the regression results, what do you say for the effect of the increase from educ = 16 to educ = 20 on wage holding all the other factors fixed?ECN140 Midterm II 2019 Winter (b) (5 points) What do you expect for the coefficient on educ if you omit educsg from the above regression? {c) (5 points) What is the statizstic for the null hypothesis that the coefficient on exper is equal to 0.57 Are you going to reject this null hypothesis against the alternative hypothesis that the coefficient on exrper is larger than 0.57 In this question, use 5% as a significance level