1. According to the EPA's prospective benefit-cost analysis of the 1990 to 2010 period, total social benefits (TSB) associated with the CAAA of 1990 are estimated at $690 billion ($1990) and the comparable total social cost (TSC) estimates are $180 billion ($1990). a) Explain why these data do not communicate whether the regulations outlined by the CAAA of 1990 are efficient. b) Using three separate graphs of conventionally shaped TSB and TSC functions, show that these values indicate that these values indicate that the regulations outlined in the CAAA of 1990 are (i) efficient; (ii) too lenient; and (iii) too stringent