6.1. What is the price-quantity combination determined by the market? A. P4, Q2 O B. P3, Q3 OC. P2, Q2 D. P2, Q4 6.2. What is the private benefit of the last unit traded in the market A. P1 B. P2 C. P3 D. P4 6.3. What is the private cost of the last unit traded in the market? O A. P1 B. P2 C. P3 O D. P4 6.4. What is the social value of the last unit traded in the market? O A. P1 O B. P2 O C. P3 O D. P4Price of high emissions vehicles S - - 50 Social D Value 0 Quantity of high emissions vehicles