Transcript text: Calculate the grade point average (GPA) of a student with the following grades: C ( 21 credit hours), D ( 36 credit hours), B ( 28 credit hours). Note that an $A$ is worth 4 points, $a B$ is worth 3 points, $a C$ is worth 2 points, D is worth 1 point, and an $F$ is worth 0 points. Round your answer to two decimal places.