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You are adding a public method named UpdateGrade to a public class named ReportCard The code region that updates the grade field must meet the

You are adding a public method named UpdateGrade to a public class named ReportCard
The code region that updates the grade field must meet the following requirements
It must be accessed by only one thread at a time.
-> It must not be vulnerable to a deadlock situation.
You need to implement the UpdateGrade() method.
What should you do?

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