a "super$-$event" that would disable both at the same time is estimated to be $0\mathrm{.}2\%.$

a$)$ The probability that both suppliers will be disrupted using option $1$ is $($round your response to five decimal places$).$

b$)$ The probability that both suppliers will be disrupted using option $2$ is $($round your response to five decimal places$).$

c$)$ provides the lowest risk of a total shutdown.