Write down demand and supply equations for wireless phones; include two exogenous
variables in each equation.
Draw a supply‐demand graph
for wireless phones.
Use your graph to show how a change in one
of your exogenous variables affects the
model’s endogenous variables.

John has served as the chief operating officer (coo) for business graphics, inc., a publicly owned firm, the past 5 years. which of the following statements about john is correct? both john and the ceo of business graphics must certify to the sec that the firm's financial statements are accurate. as the coo, john will be ranked higher than the ceo but still below the cfo. in john's postition as the coo, it is highly unlikely that he would also be the chairperson of the board of directors. as the coo, john would typically be involved with accounting, finance, and asset purchase decisions.