2.3 The following table contains the ACT scores and the GPA (grade point average) for 8 college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal. Student GPA ACT 1 2.8 21 2 3.4 24 3 3.0 26 4 3.5 27 5 3.6 29 6 3.0 25 7 2.7 25 8 3.7 30 (ii) Compute the nitted values and residuals for each observation and verify that the residuals (approximately) sum to zero. (iii) What is the predicted value of GPA when ACT = 20