How can I make a Java code that can take a student mark and the student can change their mark after retaking the exam for example to a petter on and the program will only change if it is better than the previous grade  **the grades are ( A /B+ /B/C+/C/F)** the output is kinda like this: Enter your course grade:  C Enter your new mark: B+ congrats your mark is updated or  Enter your course grade:  B+ Enter your new mark: c sorry your previous mark is better

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