$1.$ company is developing a new desktop application for project management. Describe how you would use the principles of consistency, constraints, and affordance to enhance the user experience. $(15$ Marks$)2.$ You are tasked with designing a usability test for a new online learning platform. Describe the key components of your usability test plan, including objectives, participant criteria, tasks, and metrics. $(15$ Marks$)3.$ Describe the User$-$Centered Design $($UCD$)$ lifecycle. Identify and explain each stage, and provide an example of an activity or deliverable that might be associated with each stage.$(15$ Marks$)4.$ Imagine you are redesigning a travel booking website. How would you conduct a task analysis to understand the key tasks users need to perform on the site? $(15$ Marks$)$