The following estimates are developed for a rehabilitation project at Ankara. (a) Calculate the conventional B/C (cost on one side, benefits and disbenefits on the other) ratio at a discount rate of 10% per year using annual worth. Is the project justified? [10 pts) (b) Determine the minimum first cost that is possible to render the project just economically unjustified. [10 pts] Item Cash Flow First cost. S 15.000 AW of benefits, S per year 4.000 FW of disbenefits, year 20, $6.500 M80 costs, S per year 500 Life, years 20