Crowdsourcing refers to a cooperation model in which a company or an organization voluntarily outsources the work tasks performed by employees to an unspecified public network. According to the above definition, Which of the following are crowdsourced. ['For a large number of car enthusiasts on a network platform, a company recruits authors to define and name a new concept car developed by the company.', 'College teacher Xiao Wang contacted high school classmate Xiaoli via WeChat in order to participate in an amateur model contest and asked her to help design a beautiful competition costume.', 'Software company M with system research and development as its core competitiveness, hired another company H with strong website development capability to carry out website architecture for its own company.', 'A T-shirt company in Chicago, USA has a huge network of T-shirt enthusiasts, and receives a large amount of communication information from different enthusiasts every day.']