please explain step by step

Question? A refrigcration and heating company - one that installs and repairs home central air and beating systems - has asked your advice on how to analyre thcir service quality. They have logad cestomer counplaints. Here's a recent sampling. Use the supplied template so construct a conventional cause-and-effect diagram. Place each of the coesplaiets ento a main cause; justify your choice with a brief conment as accessary. 1. "I was overchargod - your labof rates are too high." 2. "The repairman left trash where he was working." 3. "You weren't here wben you said you would be. You sbould call when you must be late." 4. "Your repairman smokod in my bouse." 5. "The part you installed is not as good as the factory eriginat," 6. Your repaiman was here for over two hours, but he wasn't taking his woek sericusly." 7. "You dutar tighten some of the funings properfy - the system's keaking." 8. "Your estimate of repair cests was WAY oft." 9. "I called yoe to do an annual inspoction, but yourve done more work that I didn't authorize." 10. "Your mechanic is just changing parts - he dositr have a cluc albat's really wroese: 11. "Your bill has conly a total - I wanted to see detailed billing." 12. "Your testing equipment ise'r very new - are you sare yoevive diagnoved the problen'? 13. "One of the workers tracked and inte my living room