What are the comparative and superlative degrees of irregular adjectives and adverbs

What are the comparative and superlative degrees of irregular adjectives and adverbs

①good/well-better-best
②bad/ill-wworse-worst
③many/much-more-most
④little-less-least
⑤far-farther-farthest
Or further further
⑥old-older-oldest
Or elder eldest