PLEASE READ! I need help on this problem. I have asked other "experts" for help on this question multiple times and all of them have provided me incorrect answers and work I am still very much stuck on this problem and would still appreciate the help. but please ensure that your work is correct and please provide me a way of me responding to you if it is wrong. Chegg is NOT cheap and I am running low on questions so please double check your response to me, Another thing I've seen people do is straight up copy and paste other experts responses. DO NOT DO THAT PLEASE!! provide the answer concisely with all your work..If you can follow all these steps your help would be greatly appreciated. Please read, solve and label all parts of the problem. Thank you!

1. Use the cash flow given and a MARR=12% to find the following: (30 points) a) Determine the number of possible rate of return values in the net cash flow series using the two sign tests. b) Find the rate or rates of return values with excel using interest between 30 and 130% and plot your results. c) Determine the external rate of return, using the modified rate of return approach with an investment rate 5% and a borrowing rate of 7%. Solve the problem using excel. 1. Use the cash flow given and a MARR=12% to find the following: (30 points) a) Determine the number of possible rate of return values in the net cash flow series using the two sign tests. b) Find the rate or rates of return values with excel using interest between 30 and 130% and plot your results. c) Determine the external rate of return, using the modified rate of return approach with an investment rate 5% and a borrowing rate of 7%. Solve the problem using excel