Assume letter grades are assigned points as follows: the letter grades A is assigned 4 points, B is assigned 3 points, C = 2 points, D =1 point and F = 0 point. A student's transcript shows an A in a 4-credit course, an A in a 3-credit course, a C in a 3-credit course, and a D in a 2-credit course. If grade points are weighted according to the number of credit hours, find the weighted mean (grade point average) rounded to 3 decimal places for this student