These are the following answers:
(1) The good becomes more expensive to produce
(2) It lowers cost and increases supply.
(3) to offset the air pollution caused by automobiles.
(4) It shifts to the left.
(5) If the price is expected to increase and then decrease, most sellers will hold onto their supply until the decrease has occurred.
(6) Fewer goods are bought.
(7) When goods are bought together, increased demand for one will decrease demand for the other.
(8) Demand for a good can be elastic at a low price but inelastic at a high price
(9) The lower the price, the larger the quantity produced
(10) marginal cost plus fixed cost fixed cost plus variable cost