How does a firm then maximize their total revenue?

1.How does a firm then maximize their total
revenue? Describe the relationship of the demand curve and total revenue curve,
indicating which of the four
types of market structures market power like this would occur (i.e., perfect
competition, monopolistic competition, oligopoly, monopoly).

2.What happens when a firm raises its price in a
market in which the price is in the inelastic range of the demand curve?

3.What happens when a firm raises its price in a
market in which the price is in the elastic range of the demand curve?