Atul-The Assistant Manager, Vikas-The Marketing Head and Leena-The Human Resource Manager of 'Montac Enterprises Ltd.' decided to leave the company. The Chief Executive officer of the company called the Human Resource Manager, Leena and requested her to fill up the vacancies before leaving the organisation. Leena suggested that her subordinate Miss Rama Wadhwa is very competent and trust worthy, if she could be moved up in the hierarchy, she would do the needful. The Chief Executive Officer agreed for the same. Mina Rama Wadhwa contacted 'Smith Recruiters' who advertised for the post of marketing head for 'Montac Enterprises Ltd'. They were able to recruit a suitable candidate for the company. Atul's vacancy was filled up by screening the database of unsolicited applications lying in the office. (a) Name the internal/external sources of recruitment used by 'Montac Enterprises Ltd'. to fill up the above stated vacancies. (b) Also state any one merit of each of the above identified source of recruitment.