The Georgia Department of Transportation (GDOT) wants to comapre two designs for highway guardrails on a reconstructed portion of 1-85. Ross Technology Company proposed a cost of $3 million to install the guardrails and they will charge $135,000 per year to maintain. On the other hand, guardrails from Long Fence, Inc. will cost $3.7 million to install and $70,000 per year to maintain. Calculate the incremental rate of return and determine which design is preferred if GDOT uses a MARR of 6% per year and a 20-year project period. You can to use Excel to solve this problem. You must upload Excel file for this one.