Suppose you are given the following equation Qx = 50 - 10 (px) + 4 (Py) + 8 (Inc) where Px, the price of the own good = $10; Py, the price of a related good =$12 and INC = Income of buyers equals $25K (use 25 for calculations). By using this information, the own price elasticity equals ____ and the demand is ____ a) -1.59; relatively inelastic b) 0.1; unitary elastic c) -1.36; relatively inelastic d) -0.50; relatively inelastic.