write a public static method named replaceFirst that takes in a String s 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: Replace.replaceFirst(“make”, ‘t’); Returns: “take” Replace.replaceFirst(“a”, ‘x’); Returns: “x” Java tests: Test replaceFirst(null, char c) replaceFirst("", char c)keyboard_arrow_up replaceFirst(String s, char c)Unit testkeyboard_arrow_down

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