The following Huffman tree is know at the receiver of a digital transmission system.

il$\_12117\_$mob$\_4389841$

Question $1$: Determine the respective code words assigned to the end nodes of the tree.

N $=$ 

$,$ S $=$ 

$,$ H $=$ 

$,$ A $=$ 

$,$ O $=$ 

Question $2$: Decode the following binary code sequence, i$.$e$.,$ identify the code words and give the resulting source symbols.

$100101110001110$

Sequence of code words:

$($Hint: separate code words with hyphens $(-).)$

Sequence of source symbols:

We now assume that an error has occurred in the sequence $($bold symbol$).$

$100001110001110$

Question $3$: Again determine the code words and give the related source symbols.

Sequence of code words:

$($Hint: separate code words with hyphens $(-).)$

Sequence of source symbols:

Question $4$: What is the disadvantage of a Huffman code in decoding?