Determine a Huffman Code for the following symbols $($with their percentage of occurrence in the data$)$: A $(40\%),$ B $(25\%),$ C $(15\%),$ D $(10\%),$ E $(5\%),$ and F $(5\%).$ Also show the average number of bits that will be used for each symbol. Search for credible sources $($and cite them properly$)$ to find at least one standard$/$protocol that uses$/$extends Huffman Code.