How to edit these shaders file?

How to edit these shaders file? If u tell me than I`ll give you 25 points.
Files are :
'Hidden/Internal-DeferredShading
Hidden/Internal-DeferredShading
Hidden/Internal-DeferredReflections
Hidden/Internal-DeferredReflections
Hidden/CubeBlur
Hidden/CubeCopy
‘Hidden/CubeBlend’

  1. Go the the Unity download page
  2. Find the Unity version you are using
  3. Select “Shaders” in the dropdown list of your platform
  4. Unzip the archive
  5. Find the desired shaders in the DefaultResourcesExtra folder
  6. Copy-paste them in your project
  7. Edit them using your IDE (don’t forget to change the shader name at the top of the file)
  8. Select your custom shader in your materials