3. A good salesperson can sell $1,000,000 worth of goods, while a poor one can sell only $ 100,000 worth of goods. Job applicants know if they are good or bad, but the rm does not. A rm will offerjob applicants a choice between a xed salary or 20% commission. Assuming risk-neutral salespersons and no opportunistic behavior, what level must the fixed salary be so that the rm can distinguish a prospective good salesperson from a poor one, and thereby avoid hiring a poor one? Is this an example of signaling or screening? Explain