Please answer the following $3-$part question given the provided information in the image. Please make sure to show all mathematical work to solve for part a$,$ and make sure to explain the why for part c$!($NO EXCEL!$)$

$($a$)$ Use annual worth and the $\frac{B}{C}$ ratio to identify the best alternative.

$($b$)$ Is there an easier way to select the best alternative?

$($c$)$ If this were a set of independent alternatives, how would you conduct a comparison?