What are the 5 cannons of rhetoric?

The book I believe had the best way in describing what applying the cannons is "the steps that go into the process of public speaking." The five steps are invention, organization, style, memory and the delivery.
This process seems like common sense of how you would organize a speech starting with the way you formulate your ideas for a speech which includes background information, objects and giving a taste of what you point is. The second step is organizing your speech which is self explanatory, it's preparing your speech on what your going to talk about. It's done through the order you plan to talk about everything. The third step is style. It's all about what your own personal twist your applying to your speech. I'm not sure if this is accurate but I interpreted it as the game plan for your method of persuasion you plan on using. Fourth is the memory where you show how well you have mastered the subject by proving it. The audience is going to be the people that tell whether you actually know what your talking about because your trying to teach them, they are learning from the presenter. If the audience does not have a good grasp on the message of the speaker then the speaker looks like they do not know what they are talking about. Lastly the delivery is how you finally present your speech to your audience. This idea can be tested by how you have influenced your audience by measuring their reaction. In my opinion I think the final step is the most important the delivery is what wins the audiences over. If you don't know what your talking it will show through your delivery. If the speaker seems excited and interested in what they're talk about that will make the audience motivated to understand as well.