has provided information about the first test grades in some previous classes, as well as the final aver- ages for the same students. Some of these grades have been sampled and are as follows: STUDENT 1 2 3 4 5 6 7 8 9 Isttestgrade 98 77 88 80 96 61 66 95 69 Final average 93 78 84 73 84 64 64 95 76 (a) Develop a regression model that could be used to predict the final average in the course based on the first test grade. (b) Predict the final average of a student who made an 83 on the first test. (c) Give the values of r and r* for this model. Inter- pret the value of r\" in the context of this