Wendy works at a hamburger restaurant that's typical for us overall market. She notices that lately the price of hamburgers has risen while their quantity has fallen. When do you think this could have occurred because one of the two events that happened recently, first event preferences for hamburger have increased. Second event, the price of the type of meat used to make the hamburgers has increased. They were all stacked on the market here or at least the dominant change comes from:

1. The second event (supply shifting right)
2. the first event (demand shifting right)
3. the first event (demand shifting left)
4. the second event ( supply shifting left)