Перевести на английский: 1.Мы должны были встретить делегацию вчера в 3 часа дня 2.Человек сможет предотвратить аварию

1. We were to meet the delegation yesterday at 3 pm 2. A person will be able to prevent an accident in the computer system if his reaction is very fast. 3. Experts on information technologies are obliged to pay serious attention to the work of the security system. 4. Electronic books can store a large amount of information. They can hastily move around the world at the speed of light.