Can anyone help me solve these practice midterm questions for 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 622 10. 238642 R-squared 0 . 2536 Adj R-squared 0 . 2493 Total | 7160.41429 625 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 educsql . 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 IT 2019 Winter (b) (5 points) What do you expect for the coefficient on educ if you omit educsq from the above regression? i) (5 points) What is the statistic for the null hypothesis that the coefficient on exper is equal to 0L57 Are you going to reject this null hypothesis against the alternative hypothesis that the coefficient on exper is larger than 0.57 In this question, use 5% as a significance level