Thelma and Louise are neighbours. During the winter,it is impossible for a snowplow to clear the street infront of Thelmas house without clearing the front ofLouises. Thelmas marginal benefit from snowplowingservices is 12 Z, whereZis the number of times thestreet is plowed. Louises marginal benefit is 8 2Z.The marginal cost of getting the street plowed is $16.Sketch the two marginal benefit schedules and theaggregate marginal benefit schedule. Draw in themarginal cost schedule, and find the efficient level ofprovision for snowplowing services.