Feng Seawater Desalination Systems has established a capital investment limit of $800,000 for next year for projects that target improved recovery of highly brackish groundwater. All projects have a 4-year life and the MARR is 10% per year. (a) Select any or all of the projects. (b) Project Z is a favorite of Mr. Feng. Determine the minimum NCF necessary to make Z the economically best project. (c) Use a spreadsheet to answer the two parts above