Engineering economy- URGENT PLEASE

Please solve it without looking at old solutions as they are all wrong

Morris Glass Company has decided to invest funds for the next 5 years so that development of "smart" glass is well funded in the future. This type of new-technology glass uses electro chrome coating to allow rapid adjustment to sun and dark in building glass, as well as assisting with internal heating and cooling cost reduction. The financial plan is to invest first, allow appreciation to occur, and then use the available funds in the future. All cash flow estimates are in $1000 units, and the interest rate expectation is 8% per year. Years 1 through 5: Invest $7000 in year 1 , decreasing by $1000 per year through year 5 . Years 6 through 10: No new investment and no withdrawals. Years 11 through 15: Withdraw $20,000 in year 11 , decreasing 20% per year through year 15 . Determine if the anticipated withdrawals will be covered by the investment and appreciation plans. If the withdrawal series is over- or underfunded, what is the exact amount available in year 11 (the beginning of the withdrawal series), provided all other estimates remain the same? (a) Solve the above including neatly drawn cash flow diagram, basic set up equation, formula lequations used and detailed neatly done hand calculations. (b) Develop Microsoft Excel spreadsheet for above requirements of the question. Hint: Use goal Seek method in determining the initial withdrawal amount