Question: Suppose demand is for pizza is given by

where Q^d is quantity demanded, P^p is the average price in dollars of a medium-sizes pizza, P^b is the average price of beer per six pack, D is a variable which takes the value 1 when it is football season and takes the value 0 otherwise, and I is personal disposable income. Calculate the price elasticity of demand, cross-price elasticity of demand and income elasticity of demand when P^p = $8, P^b = $12, D =1 and I =$10,000. Show all calculations. Interpret each of your results.