Cross out the wrong comparative or superlative forms of the adjectives

1. • busier
     , * faster
     , * difficulter
2. • the most expensive
     , * the most easy
     , * the most colourful
3. • easier
     , * lighter
     , * responsibler
4. • the most impressive
     , * the most fun
     , * the most careful
5. • the most low
     , * the most cheerful
     , * the most surprising
6. • better
     , * comfortabler
     , * simpler