Can someone correct this Assignment, please? - I'm not sure what your assignment is but I will give you as much help as I can with what you have written. :)

This assignment was the one where I found more difficulties than others. There were difficulties about the language, the way of communication and about some common saying or words that were difficult to express in Italian too.
I’ll start with languages issues.
Peter is much more sophisticated than Jerry, and Jerry calls Peter “Mr.” but this word is not a very polite word and it denote that Jerry is not so much cultivated. (did you mean "cultured"?  I would say addressing someone as "Mr. Smith" would be polite.  It depends on the situation but in most situations that would be a polite way to address someone.)My group and I thought that was good translate it with “Signore” but maybe is better translate it with “Ehi tu” or something that shows the little familiarity with the social convention.(I'm not familiar with "ehi tu" and I'm not getting a good translation from google translate but "signore" would be a good substitue for "Mr.")
Another point was the word “why”. Peter uses “why” quite frequently, but it’s not a real question, it’s a filler. When translating, we need something very vague here because it’s a word without a real meaning. For this reason, we translate this word with: “Beh”. (I don't see your assignment so I'm not sure the context it's being used in.  If you want to send it to me I'm more than happy to take a look.)
In the text we come across two different uses and meanings of the word “boy”. In the first time, Jerry use this word as an evocative. The word “boy” is common used in American English by racist people to indicate a black person. Jerry uses this offensive word even if Peter is not black; in the second time, the word is used as an exclamation of enthusiasm. (So the word "boy" can very much be used as a racial term, specifically towards an african american person.  I've never heard this term used in this way towards any other sect of people.  It is also used towards someone in the same tone to be disrespectful or talking down such as "listen here boy".  Sometimes it's used in a loving way such as "My boy!".  This would mean someone is proud of them.)
My grouop (group) and I founded were not (found we did not) agree on the translation of the word “Blockheads” that is very informal. We translate the word with “Non è per tutti” but I don’t agree because we loss part of the meaning. I’d rather translate this with “zucconi” that is more informal. ("Non è per tutti" would not be an appropriate translation.  "zucconi" translates to blockheads I believe. "Blockheads" are someone that is an idiot, dense, doesn't understand things, dummy.  This is not a very popular word in every day english.  When I hear the word it reminds me of the "Peanuts" comic sketch.  I think that's the only time I've ever heard the word "blockhead" used."

I hope this was helpful!