7.5 Assume instead that Sally's plan fails and that Mayor Springer's price ceiling is back in place. Pat the Pernicious, having just finished taking Ec 10a, sense a unique opportunity for gain as a result of the Mayor' policy. Helshe buys up all of the solar heaters available at the ceiling price and sells all of them for the highest single price he/she can. - What price is that? Why? - What is his/her profit from this undertaking? - Can Pat do even better than that? Give specific numbers if you can. [I-Iint: Calculate the elasticity of demand at the values of P and Qd you found above and think about elasticity and total revenue] Aside: many cities have forms of housing rent control in place. As you work through the solar heater question, replace the words "solar heater" with the words \"rental apartment" and think about the implications of your answers for rent control