Английский язык. Помогите с временами, например Past Simple, Past Perfect и т. д.

Какие тут?

1) Paul Allen and Bill Gates founded the Company in 1975.
2) Microsoft`s $25 billion market value tops that of Ford, General Motors.
3) And now it dominates the market.
4) Microsoft also supplies about 50 percent of the world`s software applications.
5) Microsoft is also in the market of networking, multimedia and even books.