Suppose a competitive firm and a monopolist each charge $5 for their respective outputs. One can conclude that:
a) Marginal revenue is $5 for both firms.
b) Marginal revenue is $5 for the competitive firm and less than $5 for the monopolist. X
c) Marginal revenue is less than $5 for both firms.
d) The competitive firm is charging too much and the monopolist too little.
WHY DOES IT SAY THE MR < 5 FOR MONOPOLISTS?