This rising demand for motorised boating activities at many South African estuaries is causing problems for the visitor as well as for the environment. These issues have led to calls for action by certain interested parties to regulate access (Lee et al., 2015)" 1. Mention three different types of impact analysis and briefly describe the type of impact analysis that applies to the passage above. [5] 2. Describe the concept of an externality and distinguish between a positive and a negative externality. Are rising motorised boating activities in South African estuaries a negative or a positive externality? Explain briefly. [10]