Помогите определить видовременную форму сказуемого и залог. Заранее спасибо.

Помогите определить видовременную форму сказуемого и залог. Заранее спасибо.1. Roman law is one of the greatest systems that has ever existed. 2. Britain and the United States are trying to solve the shortage of space for prisoners by allowing private companies to open prisons. 3. Before the industrialization most people worked on the land or in some craft connected with agriculture.