Figure 16-2 Plato Playhouse, a Theatre Company in the University

Figure 16-2 Plato Playhouse, a theatre company in the university town of Wegg, caters to two groups of customers: students and the non-student population. Figure 16-2 shows the demand curves for the two groups of customers.
-Refer to Figure 16-2.What is the quantity sold to each group of customer and what is the total quantity sold?

A) quantity sold to students=Q_b; quantity sold to non-students=Q_b; total sales=Q_a
B) quantity sold to students=Q_c; quantity sold to non-students=Q_b; total sales=Q_b+Q_c
C) quantity sold to students=Q_c; quantity sold to non-students=Q_e; total sales=Q_e+Q_c
D) quantity sold to students=Q_c; quantity sold to non-students=Q_d; total sales=Q_d+Q_c