Part 3: Suppose the field has a length of 8,000 feet. Shantisha buys fencing to enclose it, but has bought 120 feet too much. Rather than throwing away the extra fencing, Shantisha enclose a slightly larger field by enlarging each side of the field by the same amount, so the fencing encloses the field and a border: q What is the largest animal that could be at point X and be entirely within the border region, touching neither the fence nor the field? an ant a mouse a cat a cow an elephant O O O O 0 Part 4: Give the average rate of change of the perimeter, if the length increases from 8,000 feet to