It is important to have an SDLC in place as it helps to transform the idea of a project into a functional and completely operational structure. In addition to covering the technical aspects of system development, SDLC helps with process development, change management, user experience, and policies. Another benefit of an SDLC is that it allows for one to plan ahead of time, determine costs and staffing decisions, define goals, measure performance, and validate points at each phase of the cycle to boost the quality of the final product. $1.$ Explain what SDLC is and why we use it$.$

$2.$ Provide a general overview of what "Agile" means and compare it to Waterfall.

$3.$ Explain what SCRUM is and how it relates to agile.

$4.$ Describe the process of requirements gathering.