patty has just completed her second semester in college. She earned a grade of in her -hour course, a grade of in her -hour course, a grade of in her -hour course, and a grade of in her -hour course. Assuming that A equals 4 points, B equals 3 points, C equals 2 points, D equals 1 point, and F is worth no points, determine 's grade-point average for the semester.