How to set the following setting?

Hello, I was just testing your plugin in my local environment. Actually this my current second choice after ARI Stream Quiz. I am feeling that some features from ARI Stream Quiz plugin will make this a perfect choice for me. Here are the these-
1. The correct answers will be shown after the submission of the quiz.
2. I want the user to change their answer before submitting.
3. ARI Stream Quiz plugin provides free integration with MailChimp.
4. Adding questions to the quiz is a complicated process in your plugin. It will be simple to add questions and answers during the creation of quiz.

anyhow can I add these features in the free version??