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a ) Create a method named replaceVowels _ 3 that takes a String input and returns a new String with all vowels replaced by
a Create a method named "replaceVowels that takes a String input and returns a new String with all vowels replaced by @ b Implement another method named "UpperString" that display all the letters of a given String in upper case. c Implement a third method named "StartWithJ that takes a String input and returns true or false message if the string starts with the letter J or not.
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