Ricardo,

Unity: 5, all the parts are directly with the topic, I could understand the main idea easily.

Coherence: 3,the logical structure is good defined, but sometimes the transition is not really clear. You should work in your thesis statement

Support: 4, excellent support with all the examples about what to do in each step.

Mechanics of writing: 4. Punctuation P1 last sentence (?.) P2 3rd Sentence Punctuation. P2 4th sentence (Punctuation)