Correct the mistakes in these sentences.
1) Emma's and Sarah's school is new.
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2) Jacks' phone is on the table.
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3) At her two daugther's school, it isn't a problem to take smartphones.
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1) Emma and Sarah's school is new.  

2) Jack's phone is on the table.  

3) At her two daugthers' school, it isn't a problem to take smartphones.