Rank these animals by their lifespan.
Elephant, Dolphin, Dog, Cat
The ranked list of these animals by their average lifespan (from longest to shortest) is:
1. Elephant - average lifespan of 60-70 years
2. Dolphin - average lifespan of 40-60 years
3. Cat - average lifespan of 15 years
4. Dog - average lifespan of 10-13 years.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rank these animals by their lifespan.

### Input:
Elephant, Dolphin, Dog, Cat

### Output:
The ranked list of these animals by their average lifespan (from longest to shortest) is:
1. Elephant - average lifespan of 60-70 years
2. Dolphin - average lifespan of 40-60 years
3. Cat - average lifespan of 15 years
4. Dog - average lifespan of 10-13 years.