Assume the L'ity of Mt. Pleasant is planning to build a new administration building using an existing lot that currently has 120 trees. The following gure depicts the local residents' willingness to pay for every tree to be saved and the marginal cost (opportunity cost) that has to be paid to save each tree. a. If city officials face only two options, (i) to save 40 es or (ii) to save 29 gs, what should their choice be? Briey explain your answer. b. If city officials are allowed to save any number of trees they desire then how many trees is it optimal to be save? Briey explain your