Questiоn 1, Pаrt 2/5: D1 аnd D2 represent the demаnd curve fоr twо difference health services. Let the perfectly elastic supply curve = price = $15 for each. Calculate the arc price elasticity of demand for health service 1 and for health service 2. Please show your work. You can leave the expression as a fraction if you prefer (that is, no arithmetic is required once the expression is set up).