READ THIS, READ THIS, READ THIS, READ THIS!!!!!

This is the third time I am posting this question and asking for a solution with formulas and no EXCEL OR spreadsheet. PLEASE, if you can't answer this question, pass it, DO NOT ANSWER IT IF YOU WILL USE EXCEL OR SPREADSHEET.

Consider the following four alternatives, each of which has eight years of useful life:

A B C D

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First Cost $100.0 $80.0 $60.0 $50.0

Uniform Annual Benefit $12.2 $12.0 $9.7 $12.2

Salvage Value $75.0 $50.0 $50.0 0

Useful Life (years) 8 8 8 8

1. Use a MARR of 8% and find the best alternative based on NPW analysis.
2. Find the best alternative based on Incremental Analysis.
3. Recommend the best alternative based on the Payback period.
4. Show that the best alternative identified in (a) is an acceptable project based on (EUAB-EUAC) analysis.