Can I please see the steps for this problem. Thank You!

Compute the NPV of an investment with CFo5 = -$50 000 and CFf = +$12000 (j = 1,....,6) if the annual interest rate, compounded annually, is 8%, 10%. 2%, 15%. Interpret the results $5473.37; $2262.53; -$663.98; -$4586.74. The investment is not economically acceptable when the interest rate is 12% or greater, in which case the present worth of the cash flows is less than the (present worth of the) investment