1. Aramco must install antipollution equipment in a new refinery to meet Saudi clean-air standards. Four design alternatives are being considered, which will have capital investment and annual operating expenses as shown below. Determine which design should be selected on the basis of the PW method. The present worth of "D1" is closest to PW Design Da D2 capital investment $ 1.240.000 $1,600,000 Annual Expenses $630,000 5574.000 useful life 8 years 8 years MARR 1095 106