Make a helper method called isAllAlpha(String str). This method should return true if every character in str is a letter, upper or lower case.

• Make a helper method called isNumeric(String str). This method should return true if every character in str is a number. In addition, can contain, at most, 1 '.'
• Make sure that the name is at least 2 letters and includes no numbers
• Make sure that the password is at least 4 characters, contains at least 1 number, 1 lower case letter and 1 upper case letter.
• Don't let the user's password be the same as his or her name
• The email must include an @ as well as a "." and the "." must come after the "@"
• The zip code must be all numbers and be the right length (zip codes have between 3 and 5 digits)
• Make sure that the person was born at reasonable date (not 1820 or this year!)
• Ensure that the phone number is valid (no letters and follows the prescribed format)