Creating HTML output? Read this first.

1. From Clinic.Therapy1999, create two plots, one of AerClass and Month and one of WalkJogRun and Month.
   
   
2. Overlay the plots and scale the vertical axis from 0 to 300 in increments of 75.
   
   
3. Submit the step.
   
   
4. View the output.
   
   Return here and select Next.