McLean is going to replace his car in $3$ years when he graduates, but now he needs a radiator repair. The local shop has a used radiator, which will be guaranteed for $2$ years, or they can install a new one, which is $$guaranteed as long as you own the car.$$ The used radiator is $$250,$ and the new one is $$425.$ McLean assumes the used radiator will last $3$ years but will need to be replaced so he can sell the car. He wants to analyze the alternatives. a$.$ Graph the EUAW for the alternatives. Develop a choice table for interest rates from $0\%$ to $30\%.$ Use Excel. b$.$ If the interest rate is $20\%,$ which alternative should he choose?