There are external risks to a supply chain that cannot be controlled by an organization nor its supply chain partners. However, these risks can be monitored, mitigated or even avoided by the organization through planning and preparation. Identify and explain 4 different types of external risk to an organization's supply chain. For each type of external risk, provide an example of a disruption, how the disruption could impact the organization's business and what the organization could due to mitigate the disruption?