Write down the extended regular expression for following questions.

E.g. Social security number in the format of 999-99-9999. Answer: [0-9]{3}-[0-9]{2}-[0-9]{4}

a. Valid date format in the format of MMM-DD,YYYY. Note: the first character of the month is capitalized.

(e.g. May-09,2008 Apr-19,2018 Jan-01,2000)

b. An account name which is 8 to 15 characters long, begins with a letter or underscore, ends with a digit, and composed by letters, numbers, underscores and hyphens. (e.g. my_Name1, cat_2, One-1)

c. A single-line comment starting with a # and continuing until the end of the line. Note: only whitespace is allowed between the start of the line and the comment.

(e.g. #This program outputs the string hello world. )

d. Integers in the range between 00 and 99. (e.g. 0, 00, 01, 15, 55, 59,99)