Find the median of the following data:
$5, 3, 2, 1, 3$
If $6$ is added to the above list, find the new median.

If the mode of the following data is $7$, find the value of $x$:

$3, 5, 6, 7, 4, 4, 7, 5, 6, x-3$

The spinning wheel shown below has numbers from $1$ to $9$, and the best prize is on number$9$. Find the probability of getting the best prize.