Quiz Huffman Greedy Algorithm

#1

I am not able to understand the problem problem please help me.

Quiz doubt on huffman coding
#2

Post the message to be encoded so that we can know the frequencies of the characters and calculate the huffman codes for each character.

For aabbbbabccdddccccbbdd
The frequency of:
a:3
b: 7
c: 6
d: 5

on calculating the huffman codes using the huffman tree
you’ll get codes for:
a: 00
b: 11
c: 10
d: 01

so the decoded message for 110100 would be
bda