A group of people is assigned a task of checking papers. They are supposed to continue working without rest, and checking 1 paper is considered as 1 piece of work. 2 men and 4 women together can do 125% of this piece of work in an hour. A man works twice as fast as a woman does. How much of the same work can 4 men and 2 women fnish in an hour? 1. Can't be determined 2. 130.7% of a piece of work 3. 7.5% of 2 pieces of work 4. 156.25% of a piece of work 5. None of these