When a small plane flies with the wind, it can travel 2040 miles in 3 hours. When it flies against the wind, it takes 3.29032258064516 hours to travel the same distance. For the following problems, use $x$ for the rate of the airplane in still air and $y$ for the rate of the wind.

a) Write a mathematical expression for the distance travelled with the wind.
Answer:

b) Write a mathematical expression for the distance travelled against the wind.
Answer:

c) What is the rate of the wind? (Note: The rate is measured in miles per hour: mph )
Answer: