The fоllоwing lineаr demаnd specificаtiоn is estimated for Conlan Enterprises, a price-setting firm: Q = a + bP +cM +dPR where Q is the quantity demanded of the product Conlan Enterprises sells, P is the price of that product, M is income, and PR is the price of a related product. The results of the estimation are presented below: Assume that the income is $10,000, the price of the related good is $40, and Conlan chooses to set the price of this product at $30. At the prices and income given above, what is the income elasticity?