At Bushby Park there is a 5 m diameter circular pond which is surrounded by a 1 m wide garden bed, and then a 3 m wide lawn. A safety fence is placed around the lawn with posts every 3 m and a gateway 1.84 m wide. The gate is wrought iron. a How many metres of safety fence are needed? b How many posts are needed? c If the posts cost $15.75 and the safety fence costs $18.35 per metre, calculate the total cost of the fence (excluding the gate). 5 m 1m 3m