Question: The Viterbi algorithm can be used to extend a simplified version of the Kernighan et al. (1990) spelling error correction algorithm. Recall that the Kernighan et al. (1990) algorithm only allowed a single spelling error for each potential correction. Let's simplify by assuming that we only have three confusion matrices instead of four (del, ins and sub; no trans). Now show how the Viterbi algorithm can be used to extend the Kernighan et al. (1990) algorithm to handle multiple spelling errors per word.