How are the following demand curves likely to shift in response to the indicated changes? (a) The

Question:

How are the following demand curves likely to shift in response to the indicated changes?
(a) The effect of a drought on the demand curve for umbrellas
(b) The effect of higher popcorn prices on the demand curve for movie tickets
(c) The effect on the demand curve for coffee of a decline in the price of Coca-Cola