Assume the role of a project manager overseeing the construction of a 15-mile road. The work is uniformly spread over 12 weeks. Suppose the client has approached your firm and has requested an additional 3 miles to be added to the road without an adjustment to the project completion date. Among the 7 basic tools of quality, which tools would you recommend to control the quality in the given situation? Justify your choices with examples from your professional experience and list the merits and demerits of using the tools you choose.