How do I create Extended Text questions?

From the left menu, go to Resources section and select 'Questions'.
Click on 'Add New Question'.
Choose the question type as 'Extended Text'.
You can decide whether to make the question private or public, assign a title to it, and fill the other fields if required.
Enter the question.
For this question type, you need to add the rubrics. Enter the Rubric title, points and description.
Once done, click on 'Save'.