Develop a crawler that collects the email addresses in the visited web pages. You can write a function emails() that takes a document (as a string) as input and returns the distinct email addresses appearing in it [remove duplicate email addresses]. You should use a regular expression to find the email addresses in the document.1. Use your WebCrawler to check email links in Lab3_Webpage. html (1 point)2. Use your WebCrawler to check email links in any URL. (1 point)