The Imperial Mammoth (Mammuthus imperator) is one of the largest mammoth species to have ever lived.
A scientific reconstruction diagram of an Imperial Mammoth skeleton has a magnification of ×0.012\times 0.012×0.012. On this diagram, the vertical height from the ground to the top of the mammoth's shoulder is measured as 5.4 cm5.4\text{ cm}5.4 cm.
Calculate the actual shoulder height of the Imperial Mammoth in metres.
Explain how a warming global climate could make it difficult for such a large mammal to maintain a constant body temperature, referencing its body size.
Suggest two factors, other than climate warming, that may have caused the Imperial Mammoth to become extinct.