Jamie has just completed her second semester in college. She earned a grade of Upper C in her 3-hour topology course, a grade of Upper D in her 2-hour psychology course, a grade of Upper B in her 3-hour physics course, and a grade of Upper F in her 4-hour creative writing 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 Jamie's grade-point average for the semester