Consider the following market demand: QD = a – bP, where a, b > 0. At price P = 0.5(a/b), what is the absolute value of the price elasticity of this market demand? (NOTE: Write your answer in number format with two decimal places of precision. HINTS: First compute the expression for the price elasticity of this market demand. Next, compute the market quantity demanded at P = 0.5(a/b). Finally, substitute your P and QD values into your expression of the price elasticity of this market demand, to determine the absolute value of the price elasticity at that point.) Show all work.