Answer
6. 138 kWh
7. 525 kWh
8. 333 kWh
9. 362 kWh
10. 360 kWh
11-12. B (the most) and A (the least)
13-14. D and E
15-16. Conserve the energy by means of plugging off the swithches when the appliances are not using. We can use the elenctricity wisely by turning off the light when it is not using mostly during day time.
Hope it helps
