1. Define CRUD.
2. There are seven verb + path combinations that are necessary in a basic Sinatra app in order to provide full CRUD functionality. List each of the seven combinations, and explain what each is for.
3. Why do we use `set method_override: true`? 
4. Explain the difference between `value` and `name` in this line: `<input type='text' name='task[title]' value="<%= @task.title %>"/>`.
5. What are `params`? Where do they come from?