The estimated demand function (Moschini and Meilke, 1992) for Canadian processed pork is Q = 171 - 20p + 20p_b + 3p_c + 2Y, where Q is the quantity in million kilograms (kg) of pork per year, p is the dollar price per kg, p_b is the price of beef per kg, p_c is the price of chicken in dollars per kg, and Y is average income in thousands of dollars. What is the demand function if we hold p_b, p_c, and Y at their typical values during the period studied: p_b = 4, p_c = 3 1/3, and Y = 12.5? M