Problem 9 1) 1/3 The cash flows for two small raw water treatment systems are shown. calculate the net present value for each project and determine which should be selected on the basis of the Net Present Value at 10% per year interest. Project 1 Project 2 Annual Operating costs 8000 3500 ($) Number of years 4 4 Major Maintenance ($) 2000 at year 2000 at year 2 2 Initial costs ($) 36,000 54,000