Possessives and Attributives

Q. My husband owns a production company with his brother. The name of the company is Deep-Dish Pictures. The brothers would like to state on their video jacket that the film is: A PEPPERONI BROTHERS FILM. No one in the production company can agree if it should be: A PEPPERONI BROTHERS FILM, A PEPPERONI BROTHER’S FILM, or A PEPPERONI BROTHERS’ FILM. [Company and surname changed for this forum.] Please help!!!! Thanks!

Q. Which is correct? (a) He has 15 years’ experience designing software, or (b) He has 15 years experience designing software. I’ve seen it written both ways. I believe “years” needs an apostrophe. If he has 15 years of experience, that would translate to “15 years’ experience.” Right? Please help.

Q. Would the phrase “The Board of Trustees meeting” be considered an attributive noun? Or should possession be indicated with an apostrophe? Thank you for your assistance.

Q. I have suddenly become an editor and am having trouble on a daily basis with the numeric use of decades. First, is “the 90s” or “the ’90s” correct? We often see the apostrophe omitted these days. Next, if a sentence contains the phrase, “Perhaps the 70s best director . . .” (meaning, the best director of that decade), “70s” is both plural and possessive. Should it be “70’s”? “70s’”? Other than reconstructing the sentence, what’s an editor to do?

Q. When indicating possession of a word that ends in s, is it correct to repeat the s after using an apostrophe? For example, which is correct: “Dickens’ novel” or “Dickens’s novel”?