I need help to solve this problem because I have tried to solve it and I do not understand it, he says:

A data service for mobile clients has the following variants:

- Plan A- Flat rate, which for $ 60 covers an unlimited amount of data

- Plan B - Initial value $ 40 that covers the first 2GB of data, from there it is charged at $ 10 per GB

- Plan C: you pay for the amount of data at $ 15 per GB

Find:

a) What is the equation that represents the price of each telephone plan based on the amount of data to be used?

b) Show the graph where the three equations are presented.

c) Show the points of intersection between these lines.

d) Determine what is the data consumption interval where each plan is best.

Addis Monjes