A non-discriminating monopolist is selling 6 units at a price of $12. If the marginal revenue of the seventh unit is $5, then:
price of the seventh unit is $10.
price of the seventh unit is $11.
price of the seventh unit is greater than $12.
price of the seventh unit is $5.
Assuming the demand curve that a pure monopolist faces is downward-sloping, its total revenue:
is rising.
is falling.
may be either rising or falling.
must be negative.