Parkour is a dangerous sport that involves jumping, flipping, climbing, running, and other demanding physical activities. Many parkour enthusiast injure themselves. Write a method that returns the total injury index which is based on the following: Each ankle injury adds 1 to the index. Leg injuries add 3 to the index. Arm injuries add 8, and head injuries add 20. If the total injury index exceeds 100, then the index is doubled due to major injuries.