RegEx Game

Capital Words Validate whether a given string starts with a capital letter
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Does a Word Contain One 'a' Validate whether the given word contains one and only one letter 'a'.
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Find Prices Determine whether the given string is a valid price
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Username Validation Determine whether a given username is valid according to the following restrictions: A username has to be between 6 and 10 characters and can only contain alphanumeric characters and '_'!
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Hex Color Code Determine whether a given string is valid Hex color code.
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Valid Number? Match a valid phone number.
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Validate Password Validate a password to have the following criteria: 8-16 characters must include: 1 lowercase, 1 uppercase, 1 number only lowercase, uppercase, and numbers are valid
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