Clarissa has just completed her second semester in college. She earned a grade of B in her 1-hour discrete math course, a grade of C in her 4-hour psychology course, a grade of B in her 2-hour biology course, and a grade of F in her 5-hour studio art course. Assuming that A equals 4 points, B equals 3 points Cequals 2 points, D equals 1 point and F is worth no points, determine Clarissa's grade-point average for the semester.