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4. Imagine a world populated by superior and inferior workers. A superior worker is worth $50 per hour to any employer, and an inferior worker is worth only $20 an hour. These people work for exactly 10 hours and then retire. Let .gbe the proportion of superior workers, and (1-5) the proportion of inferior workers. Assume that in the labour market equilibrium, workers are paid their expected worthA-l 44 a) Suppose no firm can distinguish superior from inferior workers. Write down the expression determining the common wage, and explain it. J 'J Now suppose that a degree costs superior workers $200 and that it is simply impossible for an inferior worker to earn a degree. 44 'J b} Explain the conditions which must be satisfied if, in equilibrium, superior workers are willing to purchase a degree.ll +1 c) Why is the value of 5 critical?\