Amalgamated Popcorn, Inc. is a fairly small firm selling bags of flavored gourmet popcorn in a popular mall. As shop owner and operator, you have observed that your daily sales tend to follow a pattern that can be stated as: Qp = 500 - 100Pp + 1.25A - 20Ps + 2I where Qp= unit sales of popcorn bags, Pp = price of bags in dollars, A = advertising expenses, Ps = price of soda pop sold at your stand in dollars, I = per capita income of customers in thousands of dollars. You are currently charging $1 per bag of popcorn, spending $200 in advertising, charging $1 for a soda pop, and per capita income is $12,000. a. Compute the elasticity coefficients for price, advertising, income, and cross-price. b. You are currently paying $.45 for popcorn (including cost for the corn, cost to pop, and bag). Is this the profit-maximizing price?