In a class named. Problems, write a public static method named replaceFirst that takes in a Strings and a char c as arguments. The method will return a modified String replacing the first character with the one that was passed in. (Do not print out the String) Special cases: If s is null, the method should return null. If s is the blank string, "", the method should return the blank string. Example: MidtermProblems.replaceFirst ("make", 't'); Returns: "take" MidtermProblems.replaceFirst ("a", 'x'); "X" Returns:

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