Huffman coding*- a. According to the sentence "this is an example of a hutlman tree", please generate the Huffman code table and encode the above sentence with your code table.** Given a string S which consist of space char and lower case letters (i e.. which can output the huffman code table which is optimized to the input string S and convert the str into a bit pattern according to the generated huffman code table.** b. 'a, , 'z'), write a program utman code ( str)