(2 points) Several hundred students take a calculus exam on applications of integration. . 65% of students receive scores evenly distributed between 0 and 70, and . 35% of students receive scores evenly distributed between 70 and 100. The probability density function for students' exam scores is shown below. CO A 70 100 (a) Determine the values of A and B in the graph above. A= 65 B = 35 (b) Determine the median exam score. Midian: 70 (c) Determine the mean exam score. Mean: 85