You install a new Jira instance using only the default configurations. A team approaches you to set up a project with the following specifications:
* There are four standard issue types and three sub-task issue types.
* The first sub-task will need a new screen for the Edit operation.
* The second sub-task will need new screens for both the Create and Edit operations.
* Everything else should use the default configurations.
How many new Screen Schemes do you need to create?