a$)$ Explain a simple lexicon? $(6)$

$($b$)$ How does a computational lexicon differ from one of the simple lexicons as described

above? $(7)$

$($c$)$ Apply the minimum edit distance algorithm to determine the edit distance between

caves and craved. Use a cost of $1$ for substitutions, deletions and insertions. $(10)$

$($d$)$ Describe the type of information required and steps to be taken to detect and correct

isolated word spelling errors in a piece of text. For example, if $$Janaury$$ shows

instead of January.