part 1 given the following regular expressions

Question

Part 1
Given the following Regular Expressions, explain in detail the pattern accepted by each. Pay attention to all the characters being used. Your answers need not appear within an XHTML page.

1. /[a-z]*\s[0-9]*/
2. /\d+\.\d*/
3. /^\d{3}\-\d{4}$/
4. /^[A-Z]\d[A-Z]\-\d[A-Z]\d/
5. /(July|August)\s+\d{1,2}(\s|,)\d{4}/g

Part 2
Given the following descriptions, write a possible regular expression that expresses each of them. Your answers need not appear within an XHTML page.

1. Matching a Name - First name must begin with a capital letter and be at least 2 characters long followed by either a ( , ) or a whitespace. The Last Name should begin with a capital letter and be at least 2 characters long but no greater than 20 characters long.
2. Matching an Email - First section should match word characters of any length except zero and must be followed by a @ symbol. The last section should match word characters of any length except zero and must not include an underscore ( _ ). A single period ( . ) must follow along with the word com at the end. No spacing is allowed within the pattern. The pattern need not match exactly (pattern can be a substring of a larger string).