. The competitive market for flour tortillas is in equilibrium. For each of the events below, predict which curve, supply or demand or both curves, will shift. Predict changes to the equilibrium price and quantity of flour tortillas after the shift or shifts.

a. All else equal, the price of corn tortillas, a substitute for flour tortillas, decreases.

b. All else equal, the price of flour increases.

c. All else equal, combine the events in (a) and (b).