Ruby on Rails/Getting Started/Is everything installed?

If everything was installed correctly you should be able to do the following:


 * Type irb -v on the command line and see the version number for irb, the interactive Ruby interpreter
 * What version do you expect to see here??
 * Type gem -v on the command line and see the version number for RubyGems
 * What version do you expect to see here??
 * Type rails -v and the installed Rails version number should be displayed
 * What version do you expect to see here??
 * Type rails testapp and a new Rails app should be created in a directory called testapp
 * Change into the testapp directory and run script/server, launching the built-in Rails server
 * Open a browser and go to the URL .  You should see the What should you see here??.
 * Type rake and the Rails application's tests should run
 * Will they work out of the box? What is the expected output?