Can you help me with this statistic question ? Thank you

2. A social economist studies the relationship between a happiness index Y, life expectancy X1, and a freedom index X2 for individual countries. She examines two different models, the first has one predictor and the second has two predictors. Model 1: Estimate Std. Error (Intercept) 0.98 0.919 Df Sum Sq Mean Sq x1 0.08 0.014 x1 1 27.091 27.091 Residuals 24 21.230 0.885 Residual standard error: 0.941 a) Write the estimated SLR equation for Model 1. How many countries are in the sample? b) Interpret the estimated slope in the context of the problem. c) Compute and interpret the coefcient of determination. d) Conduct a NATDRC model utility (t) test at a 0.05 level of signicance. Use p-value = 1x 105