Pears DeHoratius Electronics, Inc., is evaluating several options for sourcing a critical processor for its new modem. Three sources are being considered: Hi$-$Tech in Canada, Zia in Hong Kong, and Zaragoza in Spain. The owner, Nicole DeHoratius, has determined that only three criteria are critical. She has rated each firm on a $15$ scale $($with $5$ being highest$)$ and has also placed an importance weight on each of the factors. After further consideration, Nicole decided to add sustainability as a fourth factor $($criterion$)$ and modify the importance weight of all factors as follows: $1)$ cost: $\mathrm{.}4,2)$ reliability: $\mathrm{.}2,3)$ competence: $\mathrm{.}2,$ and $4)$ sustainability: $\mathrm{.}2.$ After evaluating each option, Nicole rated each option as follows as far as sustainability: a$)$ Hi$-$Tech $($Canada$)$: $4,$ Zia $($Hong Kong$)$: $5,$ and Zaragoza $($Spain$)$: $3.$ How would each critical processor option rank given these new assumptions and why would Nicole consider sustainability as a fourth factor?