Quick$-$Codes is a software system under development by XYZ Corporation. It is designed to translate digital versions of three$-$dimensional computer models, containing a wide variety of part shapes with machined and highly finished $($ultra$-$smooth$)$ surfaces. The product of the system is the numerically controlled $($NC$)$ machine code for the part's manufacturing. Additionally, Quick$-$Codes will generate the code for superfine finishing of surfaces with continuous control of the finishing machines.

There are two alternative computers that can provide the server function for the software interfaces and shared database updates on the manufacturing floor while Quick$-$Codes is operating in parallel mode. The server first cost and estimated contribution to annual net cash flow are summarized below.

$\backslash$table$[[,$Server A$,$Server B$],[$First cost$,$ $$,120,000,220,000],[$Net cash flow, S$/$year$,40,000,\backslash$table$[[55,000$ year $1,$ increase of $6000$ per year for$],[$years $2,3,$ and $4($gradient$)]]],[,,\backslash$table$[[85,000$ maximum for years $5$ to $10,$ even if the$],[$server is replaced$]]],[$Life$,$ years,$5,10]]$

The life estimates were developed by two different individuals: a design engineer and a manufacturing manager. They have asked that, at this stage of the project, all analyses be performed using both life estimates for each system.

If the MARR $=12\%,$ use the $AW$ method and repeatability assumption to answer the following:

a$.$ AW for Server $A=$$ Blank $1_{?}$

b$.AW$ for Server $B=$$ Blank $2$