Explain whether the following event will affect the demand or the supply of Xbox game, use a graph to illustrate.

a. The price of an Xbox falls b. The prices of a PS3 and a Wii fall. c. The number of people writing and producing Xbox games increases. d. Consumers incomes increase. e. Programmers who write code for Xbox games become more costly to hire. f. A new game console that is a close substitute for Xbox comes onto the market.