S $ 80 S' $ 70 $ 60 S $ 50 $ 40 $ 30 D $ 20 $ 10 1000 2000 3000 4000 5000 Q Figure 9.4.3 Refer to Figure 9.4.3 above. After the policy was implemented, the quantity traded became: 2000. 4000 3000. 1000. between 2000 and 4000, but the amount depends upon producers' reactions, which are uncertain