Question: 4. (5p) Write a JavaScript function to check whether a phone number is a valid one or not. If the phone number is valid, your

4. (5p) Write a JavaScript function to check whether a phone

4. (5p) Write a JavaScript function to check whether a phone number is a valid one or not. If the phone number is valid, your function should return true, false otherwise. A valid phone number is the one that is formed from exactly 7 digits and starts with either '22' or '36

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