Please I need full and correct answer its IT201

Why is it important to understand tradeoffs between usability measures for various kinds of systems? Explain by describing usability motivations for Industrial systems and Life Critical systems. What is an interaction style and what is its role in effective interface design? List and briefly describe any two advantages and disadvantages of each interaction style. suppose that you have in charge the task of developing interfaces for an interactive Let's system (web site, mobile application, etc.). Sketch out the main steps that you would ultimately include in your design process. 1 Mark Question Four Usability testing is a significant aspect for effective interface development. List and briefly describe any four methods of usability testing. N.B. The question asks about methods of usability testing not tools used in usability testing (surveys are an example of tools)