Some older case studies for MEST 3 from around the web:

http://ashakabadehmest3.blogspot.co.uk/2011/02/impact-of-new-and-digital-media-on-tv.html
http://zainabaljawahiri-zainaba.blogspot.co.uk/2012/01/mr-bush-case-study-hwk.html
http://parmindermest3.blogspot.co.uk/2011/02/impact-of-new-and-digital-media-case_7865.htmlhttp://mrdalesmedia.wordpress.com/2013/01/15/mest-3-section-b-the-impact-of-newdigital-media-previous-examination-questions/