Write the number that comes in between $49$ and $51$.

Write the number that falls just before the number $78$.

Write the number that comes after $69$.

Write the number that comes in between $54$ and $56$.

Write the number that comes before $99$.

Write the number that comes after $15$.

Write the number that comes in between $71$ and $73$.

Write the number that comes before $44$.

Arrange the following numbers in ascending (or increasing) order.

$6, 9, 5, 1, 8$