In this exercise, we generate an input form and implement two Callback methods for the Back and Save button.

The form contains two mandatory fields, which, in case of a validation failure, should result in a corresponding message:

1. Selection of the design for the user interface
2. Generation of the action class
3. Preparing the form data
4. Defining the form structure in the JSP-Page
5. Implementation of the Callback methods
6. Validation and error presentation

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