(8 points) Imagine that you are given the task of building a system to distinguish junk email from important messages. Consider aspects of junk email that let us know that it is junk and think about how a computer could use such information to automatically label messages as "junk" or "real". For this question, generate at least 10 features that a computer could automatically extract from messages and use to determine if a message is junk or real. For each feature, briefly describe how a computer would extract the feature and why it is useful for this task