A student receives the following​ grades, with an A worth 4​ points, a B worth 3​ points, a C worth 2​ points, and a D worth 1 point. What is the​ student's weighted mean grade point​ score? B in 22 two​-credit classes, D in 1 four​-credit class, A in 1 three​-credit class, C in 1 three​-credit class