Consider the following production function as presented in the Week 3 lecture. 100 90 80 70 Final exam mark 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Hours of study per day Which of the following is NOT correct? Select one: O a. The slope of the OB line is a marginal product. O b. The slope of the OC line is an average product. O c. The average product at point C is greater than the average product at point B. O d. The slope of the line tangent to the production function at point C is a marginal product