2. Starting salaries for BBA students is given in the file BBA Salaries, along with data descriptions under the tab Data Details. (25 points) (a) Using a significance level of .05, is there evidence that the rate at which BBA salaries change varies with Experience and Class Rank? To answer this, first run the appropriate regression and state your model along with p-values in parentheses below each coefficient. (10 points) (b) Interpret the r-squared. (5 points) (c) Compare two students with different class ranks, say 25 and 75, respectively. How do the predicted salaries for these two students vary with experience? That is, what is the effect of more experience on salary as the students' class ranking increases? (10 points)