Car inspection: Of all the registered automobiles in a city, $7\%$ fail the emissions test. Thirteen automobiles are selected at random to undergo an emissions test. Round the answers to at least four decimal places.

Part $1$ of $4$

Find the probability that exactly four of them fail the test.The probability that exactly four of them fail the test is $\_\_\_\_$

Part $2$ of $4$

Find the probability that fewer than four of them fail the test.The probability that fewer than four of them fail the test is $\_\_\_\_\_\_$

Part $3$ of $4$

Find the probability that more than three of them fail the test.The probability that more than three of them fail the test is $\_\_\_\_$

Part $4$ of $4$

Would it be unusual for none of them to fail the test?

It $($would or wouldn't$)$ be unusual for none of them to fail the test since the probability is $\_\_\_\_\_\_$