Your flight has been delayed:

At Denver International Airport, $86\%$ of recent flights have arrived on time. A sample of $10$ flights is studied. Round the

possibilities to at least $4$ decimal places

Part $1$ of $4$

$($a$)$ The probability that all $10$ of the flights were on time is $0\mathrm{.}2213$

Part $2$ of $4$

$($b$)$ The probability that exactly $8$ of the flights were on time is $0\mathrm{.}2639$

Part $3$ of $4$

$($c$)$ The probability that $8$ or more of the flights were on time is $0\mathrm{.}8455$

Part $4$ of $4$

$($d$)$ Would it be unusual for $9$ or more of the flights to be on time since the probability is $\_\_\_\_\_\_\_\_$