Urgent Help Needed

Fox Pty Ltd (Fox) is a listed company on ASX and is aiming to invest $500,000 into a new product line. The residual value of this investment at the end of 5 years would be $50,000, which is depreciated using Straight Line Method. This investment brings additional net operating income of $80,000 which would be increased by 7% each year till year 5 . Also, for this investment, Fox is required to invest 3% of the new net operating income each year. Having tax rate of 30%, calculate: a) Investment Free Cash Flows for years 0 to 5 ? b) NPV if discount rate (WACC) is 9%? c) NPV if the growth rate of net operating income is change by +2% and 2% (from 7%, it is changed to 9% and 5% respectively), discount rate is still 9%. Discuss and analyze if this investment is risky or not and advise what other methods would you recommend evaluating investment cash flow risk