The correct sentences are: His brother's friend is here, my mother's sister is my aunt, my friend's names are Jeff and Joe, Jill is Bill's cousin and Steve's brother's name is Gary.
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What do you mean by apostrophes?</h3>
The apostrophes are referring as the punctuation marks and also known as the diacritical mark in the different languages used in the Latin alphabet.
Moreover, there are normally two main purposes to use the apostrophes is to mark the omission of more than one letters and to form possessive nouns. Likewise in the above sentences the apostrophes are utilized with words brother's, mother's, friend's, bill's and brother's etc.
Adding to it, the rules of apostrophes include to indicate plurals of letters, numbers and symbols and there are basically two types of apostrophes that consist of smart and straight.
Learn more about apostrophes, refer to the link:
brainly.com/question/1999819
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