Can someone help me in finding out the right answer from the given options. Demand curve for the gasoline, a normal good, would shift to right when: (1) The legal least age to drive was raised to 18 all through the world. (2) New oil fields were discovered and exploited, lowering down the price of gasoline. (3) A new law mandated raised fuel efficiency for all the cars sold in United States. (4) Average house-hold income rose all through the United States. (5) All interstate highways were transformed to toll roads, by fees per mile driven.