Business impact analysis (BIA) is an important exercise when developing a business continuity plan. The first step in BIA is to identify critical business activities. Describe in your own words what you think critical activities are and give two (2) examples of such critical activities of a supercomputing centre which provides services to registered users via the Internet. Suppose the BIA team of the supercomputing centre is determining the recover time objective (RTO) of a critical activity that will need to be recovered at an offsite facility due to a natural disaster. The company has determined how the impact due to ceasing of this activity depends on recovery time. The centre has also obtain quotes from offsite facility providers which allow the company to derive the relationship between the cost and recovery time. Suggest how they should determine the RTO value based on the above information. Discuss how the RTO value may be revised if additional requirements are also given. Your answer must contain examples to support your argument.