Sources

1.Demographic chart pictures

http://vator.tv/news/2012-08-22-age-gender-24-social-network-demographics

2.https://www.flickr.com/about

3. http://time.com/6855/flickr-turns-10-the-rise-fall-and-revival-of-a-photo-sharing-community/

4. https://www.lifehack.org/articles/productivity/30-most-inspirational-quotes-successful-ceos.html

5. https://www.deseretnews.com/article/900007867/7-quotes-from-slack-ceo-stewart-butterfield-about-failure-creativity-and-the-internet.html