How does the LA Fitness price and membership fees reflect the Price Discrimination?

How does the LA Fitness price and membership fees reflect the Price Discrimination?
Write an essay to analyze the price system of LA Fitness and discuss how it reflects the Price Discrimination.
The analysis must be deep. You should explain how the price reflects the Price Discrimination (the Third-degree Price Discrimination) comprehensively and IN DETAILS. You can have a diagram of price discrimination to explain.