on weeknights an uber driver can expect to earn $110 driving a six-hour shift. surge pricing on saturday nights mean that uber drivers can expect to earn $140 driving a six-hour shift. on weeknights, there are 200 drivers on the road, which rises to 300 on saturdays. calculate the price elasticity of supply of uber drivers using the midpoint formula. please choose the correct answer from the following choices, and then select the submit answer button. answer choices