PLEASE NUMBER EACH QUESTION1. Outline the evolution of how viruses were initially and now are spread. .  Your response should be a minimum of 100 words.2. What is a DoS attack? How does it work?  Your response should be a minimum of 100 words.3. Explain what a computer worm is and how it functions.  Your response should be a minimum of 100 words.4. Explain what a botnet is and how it is used.Your response should be a minimum of 100 words.5. Define and distinguish adware and spyware. Give an example of each.Your response should be a minimum of 100 words.6. Outline the history and development of computer viruses.  Your response should be a minimum of 225 words.7. How should virus writers be classified? Can they all be classified the same way? Why, or why not? Give specific examples.  Your response should be a minimum of 225 words.8. What is a Trojan horse virus? Briefly summarize how they work.  Your response should be a minimum of 225 words.