4. A city is planning to invest $710,000 for a water treatment plant and need to select projects from the following list. Select any or all of the following independent projects using a MARR of 10% per year (HINT: Calculate PW for all feasible bundles, show PW values for all feasible bundles in the solution and select the bundle). What is the largest PW value? Project Annual cost Salvage Value Initial Investment -140,000 -300,000 -590,000 Life, years 4 4 A B C 50,000 90,000 150,000 45,000 -10,000 100,000 6