Lydia, the owner of a railroad company in Belgium, acts as a monopolist. Each train has two types of seats: business class and economy class. Lydia can install seat cushions in the economy class that would increase the willingness to pay for economy class by more than the cost of installation. What will happen to Lydia's profits when she installs the cushions?
a) Lydia will increase her profits by installing the cushions.
b) Lydia will decrease her profits by installing the cushions.
c) Lydia's profits will be unchanged by installing the cushions.
d) The answer is ambiguous.