Three students have different demands for doughnuts. André's demand is given by Q = 5 - P;

Question:

Three students have different demands for doughnuts. André's demand is given by Q = 5 - P; Carlene's demand is given by Q = 6 - 2P; Cooper's demand is given by Q = 4 - 0.5P.
a. Derive the market demand curve for doughnuts algebraically.
b. Graph the market demand curve for doughnuts. Pay special attention to any kinks in the market demand!