Learning Goal: I'm working on a management case study and need an explanation and answer to help me learn.1-Using your own words, explain in brief the idea behind six-sigma concept, and how it does benefit the business? ( 1.5 Mark) ( 100 -150 words)2- Describe the main stages of DMAIC as indicated in the case study. ( 1.5) ( 100 – 150 words)3-From your point of view, which one of these stage is more critical, and Why? ( 1 Mark). ( 100 – 120 words)4- Assess the application of DMAIC on the company ( production process) in term of its implementation and results efficiency ( 1 mark ) ( 100 – 120 words)