a firm plans to invest in a new project that will last for four years and will generate revenues of $1,000,000 in year one, $1,300,000 in year two, $1,500,000 in year three and $1,250,000 in year four. the investment in net working capital needs to be 15% of the revenue in the following time period. what is the cash flow from changes in net working capital in year three?