Suppose you're deciding where to order a Hawaiian pizza, and waiting time is a concern of yours. You're considering Krazy Karl's Pizza where the average waiting time is $64\mathrm{.}4$ minutes, with a standard deviation of $4\mathrm{.}5$ minutes. Or$,$ you might call Domino's Pizza where the average waiting time is $55\mathrm{.}8$ minutes, with a standard deviation of $8\mathrm{.}3$ minutes. $9.$ Find the Z$-$score for a waiting time of