11.
What is the purpose of the gemspec file in a Ruby gem?

15.
What is the purpose of the --no-ri and --no-rdoc flags when installing gems?

16.
What is the purpose of the gem update --system command in Ruby?

17.
How do you specify a specific version of a gem to be installed in a Gemfile?

19.
What does the --remote flag do in the context of the gem list command in Ruby?

20.
What is the purpose of the gem owner gem_name command in Ruby?