Using the following regular expression like Quantifiers: *, +, ?, and {...} , Character classes: [...] , Grouping: (...) constructs the following statements:

1. A phone number in USA without international dialing sequence. A phone number in USA is a sequence of 10 digits (0-9). The digits are divided into 3 groups: a 3-digit area code, a 3-digit prefix, and a 4-digit suffix. The area code will never start with \"0\" or \"1\". To display a phone number, we can put a pair of parentheses3 around the area code; leave a space between the closing parenthesis and the prefix; and put a hyphen between the prefix and suffix. (There are many other commonly used formats, but we focus on this format only.) For example, the main phone number for FSU is \"(910) 672-1111\".

2) A Haskell variable. A Haskell variable is a sequence of one or more characters which can be either uppercase letter (A-Z), lowercase letters (a-z), digits (0-9), the underscore (_) character, or the apostrophe (') characters. However, the first character must be either a lowercase letters or an underscore character. For example, both \"abc1\", \"_xyz'\" are valid Haskell variables. 4