4.	Assume  that a perfectly competitive industry that produces eyelets is taken  over by a single firm and transformed into a monopoly.  The monopolist  faces the following demand function:  Q = 100 - 2P.  Marginal and  average costs are equal and constant at $20 per unit. (There are no  fixed costs)   Again, it is recommended that you draw a graph .
 
 a.	Find the profit-maximizing price and output of the new monopoly. 
 b.	Find the level of monopoly profits. 
 c.	Calculate the efficiency loss or deadweight loss associated with monopolization. 
 d.	 Now assume that the absence of competition under monopoly over time  raises costs of production to $30 per unit.  Calculate the increase in  production costs due to X-Inefficiency.