5. Like most colleges, City College calculates a student's Grade Point Average (GPA) by weighting each grade based on the number of units in the class. The following scale is used to convert letter grades into a quantitative variable: A = 4 B = 3 C=2 D = 1 F = 0 George's transcript shows the following grades. Class Units Grade English 3 B Biology 4 C Geography 3 B Weightlifting 1 A Statistics 4 A German 5 F Calculate George's GPA.