Q2: Has he failed before in these sort of tests?
It is not mentioned in the given statement whether Stephen Rodriguez has failed before in these sorts of tests. Therefore, we cannot definitively conclude whether he has failed or not.

Q3: What are some signs to show he is nervous?
There are several signs that can indicate nervousness in a person. Some of these signs include:
1. Restlessness: Stephen might display signs of restlessness, such as fidgeting or constantly shifting in his seat.
2. Increased heart rate: Nervousness can lead to an elevated heart rate, which can be observed through visible signs like a faster pulse or heavy breathing.
3. Sweating: Nervousness often causes a person to sweat more than usual, even if the room temperature is cool.
4. Lack of eye contact: Stephen might avoid making direct eye contact with others, as it is a common sign of nervousness.
5. Difficulty speaking: Nervousness can cause a person to stumble over their words or speak with a shaky voice.

Q4: 'I've come prepared'. Do you think he has prepared his lesson or made preparations for cheating? How do you know? Explain in detail.
Based on the given statement, it is difficult to determine whether Stephen Rodriguez has prepared his lesson or made preparations for cheating. However, we can analyze the phrase "I've come prepared" to gather some insights.

1. Context: The context of the statement suggests that Stephen is referring to a test or an exam. Therefore, it is more likely that he is referring to being prepared for the test rather than preparing for cheating.

2. Ethical implications: The statement "I've come prepared" implies a sense of responsibility and readiness. It is more aligned with the idea of being prepared through studying, reviewing notes, and understanding the material, rather than resorting to dishonest means like cheating.

3. Personal integrity: Assuming Stephen is an honest individual, it is reasonable to believe that he values personal integrity and would not engage in cheating. Therefore, it is more plausible that he has prepared his lesson rather than made preparations for cheating.

4. Positive mindset: By stating "I've come prepared," Stephen is displaying a positive mindset and confidence in his abilities. This suggests that he has put effort into studying and is ready to showcase his knowledge in the test.

In conclusion, based on the given statement and the analysis of the phrase "I've come prepared," it is more likely that Stephen Rodriguez has prepared his lesson rather than made preparations for cheating.