please help me figure out how to compute IRR. please explain with a financial calculator or TI-84. and by using the 0=-cf+cf/r(1/(1+r)) methods.

Question Help FastTrack Bikes, Inc. is thinking of developing a new composite road bike. Development will take six years and the cost is $196.20 per year. Once in production, the bike is expected to make $298.870 per year for 10 years. The cash inflows begin at the end of year 7 For parts a-c assume the cost of capital is 9.7% a. Calculate the NPV of this investment opportunity. Should the company make the investment? b. Calculate the IRR and use it to determine the maximum deviation allowable in the cost of capital estimate to leave the decision unchanged c. How long must development last to change the decision? For parts d-f, assume the cost of capital is 14.4%. d Calculate the NPV nf this investment onnortunihe Shouldl the coonany, make the investment b. Calculate the IR unchanged R and use it to determine the maximum deviation allowable in the cost of capital estimate to leave the decision Use a financial calculator or the IRR function within Microsoft Excel to calculate the IRR The IRR is 12.89%. (Round to two decimal places.) Enter your answer in the answer box and then click Check Answer parts remaining Check AnswerClose Clear DOLL