Please provide me code for these two question in ***Java***

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6. Write a method

public static int countVowels(String str)

that returns a count of all vowels in the string str. Vowels are the letters a, e, i, o, and u, and their uppercase variants.

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7. Write a method

public static int countWords(String str)

that returns a count of all words in the string str. Words are separated by spaces. For example, countWords("Mary had a little lamb") should return 5.