Please show all steps or it won't count. Thank you.

3. [6 Points] "Fear leads to memorizing which is a gateway to the dark side!" A set of gears is constructed such that the second and third gears are on the same axle. As the first axle revolves, it drives the second axle, which in turn drives the third axle. Let y,u, and x represent the numbers of revolutions per minute of the first, second, and third axles respectively. Suppose that the circumference of the second gear is three times that of the first, thus, the first axle must make three revolutions to turn the second axle once. Similarly, the second axle is two times that of the third axle. What is the rate of change of the first axle with respect to the third axle? Explain how the chain rule is applied to answer this