The file P10_14.xlsx includes data on the 50 top graduate programs in the United States, according to a recent U.S. News & World Report survey. Columns B, C, and D contain the average starting salary of the students of each university, a ranking score of each university (highest is 100), the average GMAT scores and the average GPA after graduation. Run three separate regressions, each using the Average Salary as the dependent variable and university Score, GMAT, and GPA as single independent variables. Interpret these equations. 1. Regression Equation with University score as independent variable: 2. Regression Equation with GMAT as independent variable: 3. Regression Equation with GPA as independent variable: 4. The only variables that is NOT a good predictor of the starting salary at a significance level of 0.05 is _________________ . The p-value of the regression coeficient (Beta1) of this valriable is _________________. 5. How much more money can you expect to earn after graduation if your GMAT score is 1 point higher?