Stone, brush, cars, shovel, clock, robot, pencils, ball, doll, skateboard, cloud and chips. :D
Abuse? Torture? You have to explane it better.
Surgical correction is generally only required for (c) very serious injuries. Minor injuries generally only need minimal first aid, fractures are often set and casted and will heal on their own, and hematomas are just poolings of blood from an injury that often will resolve themselves.
Answer:
The mean population is computed by adding the population for the beginning of each of the twelve months and for the end of the last month, and dividing the sum by 13.
