security architecture and design

I need 600 words with no plaigarism

 Briefly respond to all following questions. Make sure to explain and backup your response with facts and examples. This assignment should be in APA format and have to include at least two references. 

 1) Explain how to threat model software you acquire. 

2) Explain how to threat model software you build. 

3) List two specific non-threat-modeling-driven tests you can perform.