please help with these questions and explanations.

Problem ser 3: use the following information to answer questions 10-12 (30 points total): 10. Calculate the Y-intercept, a, of the regression equation using the following information: (10 pts) Mean number of vears of schooling: 15 (X) Mean monthly income: $3.780 (7) Slope, b, of the regression equation: $120 (h, slope) 11. Consider the following linear regression prediction equation: Y = 10 + -1x. If x -4, what is the predicted value of, Y, for this observation (10 pts)? 12, Consider the followving linear regression prediction equation Y = 10 - -1x. If the predicted value of, Y for an observation is 3, calculate the residual for an observation where the observed valite, Y, is equal to 9 (10 pts)? Problem ser f use the following information to answer questions 13-14 (10 points total) The following data on fertility rates were obtained from Eurostat on seven European countries in 2008. The covariance between the mean age at childbe king and the total fertilityrate is 2.02 (St) And. the Varianc 1930)4022, Country Mean Age at Childbearing Total Fertility Rate Denmark Ireland 50.06 Greece 29 87 Spain 30.85 France Italy 30.57 Netherlands Mean 50.41 X bar 1.65 Source, International Social Survey Program, 2008. 13. Using this information and the infournation provided in the teble above, calculate the intercept (a) and the slope (b) and write down the linear regression equationchich summarizes the relationship between these two variables (8 pto). 14. The coefficient of determmation. 12 is a PRE measure. What does this mean? () pts)