56. Team A needs 6 hours to move the goods in a warehouse, Team B needs 7 hours, and Team C needs 14 hours. There are two identical warehouses, A and B. Team A starts moving goods in warehouse A, and Team B starts moving goods in warehouse B at the same time. Team C first helps Team A, and then goes to help Team B. In the end, the goods in both warehouses A and B are moved at the same time. Then, Team C helped Team A for $\qquad$ hours, and helped Team B for $\qquad$ hours.
Reference answer: $\frac{7}{4} , \frac{7}{2}$