Помогите, пожалуйста, очень запутанное задание!

[Макс]

Подчеркните местоимения и определите к какому классу они принадлежат:

1. The value of significance since it introduces an equivalent error of up 0,4% throughout the range.
2. The operation that it performs are those which in general take the greatest amount of time.
3. Tell him to call me right away.