Determine which metric unit you would use to express the following:
- The length of your middle finger.
- The weight of an elephant.
- The weight of the ring.
- The weight of the tablet.
- The length of the safety pin.
- The height of the building.
- The length of the seashore in Tamilnadu.
- The volume of a cup of coffee.
- The capacity of water in the tank.