1. Given the following regular definitions related to an email format, using the JFLEX program to write a scanner which recognizes a correct email address. a. Regular Definitions Email username @ domain name (. extension)+ username id domain name id extension (letter)+ id (letter digit)+ letter: all the alphabet letters and the special characters except: slash, backslash, colon, star, question mark, double quotes, minus, greater, OR symbol. digit: digits from 0 to 9 b. Example Input file: abc@bba.com yie@y7.com dbi@cl.ed.kh.com idb@ Outputs: Correct: abc @bba.com Correct: yie@y7.com Correct: dbi@cl.ed.kh.com Incorrect: idb@