Write the smallest digit and the greatest digit in the blank space of the number $4765\_2$, so that the number formed is divisible by $3$.

Write a digit in the blank space of the number so that the number formed is divisible by $11:$

$8\_9484$

Find the total number of common factors of $56$and $120$.(Write the numerical value as the final answer)

Find the largest common factor of $4, 8$ and $12$ by finding all the common factors.