The capital fund for research project investment at a corporation is limited to $100,000 for next year. Use PW analysis to select any or all of the following proposals if MARR is 15% per year Initial Annual Net Cash Life Salvage Value ($) Flow ($/year) Project Investment ($) (years) A -25,000 6,000 4 4,000 -1,000 B -30,000 9,000 4 -50,000 C 15,000 4 20,000 (a) [5 points] [Include in PDF file.] Formulate the mutually-exclusive alternatives without calculating any worth. (b) [10 points] Include in PDF file.] Set up the PW relations using factor notation, use interest-factor table (with at least four digits after the decimal) to do the PW analysis, and comment. (c) [10 points] [Include in Excel file.] Use Excel built-in function(s), not the interest factor table, to do the PW analysis and comment