The Consolidated Oil Company must install antipollution equipment in a new refinery to meet federal clean-air standards. Four design alternatives are being considered, which will have capital investment and annual operating expenses as shown below. Assuming a useful life of 8 years for each design, no market vaiue, a desired MARR of 10% per year, determine which design should be selected on the basis of the PW method. Confirm your selection by using the FW and AW methods. Which rule (Section 6.2.2] applies? Why? Design Capital Investment Annual Expenses D1 $600,000 $780,000 D2 760,000 728,000 D3 1,240,000 630,000 D4 1,600,000 574