Jack's company is an IT web hosting company that delivers a range of shared web services used by a wide variety of customers. One of Jack's clients is Credit Worldwide Corporation (CWC). More precisely, CWC's marketing department used a service hosted by Jack's company on premise environment. The service provides functions for conducting public surveys. Recently, CWC complained about Jack's company's billing practices and the trustworthiness of its hosting environment. Jack's business currently charges a flat fee to all of its customers, regardless of how often or how much a customer uses the service. In addition, the public survey service was repeatedly attacked by computer viruses and thus the server was not always available for CWC and other clients. In response to CWC's complaints, Jack plans to switch his existing business style to a cloud-based hosting platform. Jack wishes to have a lot of freedom to manage his infrastructure, although it has become a cloud-based hosting platform. Consider the above situation, indicate which TWO (2) specific characteristics of a cloud can help resolve Jack problems. Discuss your answer.