Can someone show me how this would be done?

Calculate the net present value for the following 15-year projects. Comment on the acceptability of each. Assume that the firm has a cost capital of 9%.

• Initial investment is $1,000,000; cash inflows are $150000 per year.
• Initial investment is $2,500,000; cash inflows are $320,000 per year.
• Initial investment is $3,000,000; cash inflows are $365,000 per year.