Will the following factors lead to an increase (I)/ decrease (D)/ no change (NC) in the demand (D) or supply (S) in the market for gasoline?

1. The income of consumers increases. (Gasoline is a normal good.)
2. We suddenly discovered a new oil field in Alberta.
3. A new churning invention reduces the cost of producing hybrid cars.
4. The production of diesel becomes more plentiful (diesel and gasoline are substitutes).
5. A new government levies a special tax on gasoline consumption in order to protect the environment.
6. OPEC decides to increase the price of gasoline next year in the hope of making more profits.
7. Automobiles are now become more fuel-efficient.