Attached to this DQ you will find a somewhat dated, but still useful, lecture I used to use in class which focuses on viruses and antivirus for UNIX/Linux operating systems. Each of the antivirus programs mentioned in the lecture is commercial – there is no mention of open source antivirus options. Why do you think this is? In at least 250 words, give three reasons (and support them) why open source antivirus technology has been slow to develop.