1.) who founded wikipedia?
It was created by Larry Sanger and Jimmy Wales.

2.) Who contributes to wikipedia and why?
Basically anyone can contribute to wikipedia so it can have the most updated information. Wikipedia uses a type of software called a "wiki", allowing visitors to add, remove, or otherwise edit and change its content. It is therefore possible for large numbers of people to create articles and update them quickly as new information becomes available.

3.) Do you think that google is better for research than wikipedia?
yes, because wikipedia can have false information due to people being allowed to change the information.