A group of friends decided to keep track of the number of hours they spent on different activities over a week. The data they recorded is as follows:
Reading: 5, 3, 2, 6, 4
Video Games: 8, 7, 5, 4, 6
Sports: 4, 6, 5, 3, 6
Based on this data, what is the mean number of hours spent on 'Video Games'?