Company X has shaken up the software industry with its innovative business model and resounding success. The company provides Customer Relationship Management (CRM) and other application software solutions in the form of software as a service (SaaS) leased over the Internet. Additionally, the company has intensified its efforts to provide cloud computing to its customers. The company is also in favor of promoting green computing and has therefore adopted virtualization techniques. (a) Explain the term "software as a service (SaaS)"and discuss how customers of Company X can potentially benefit from SaaS. (b) Discuss two threats associated with cloud computing. (c) Briefly explain the purpose of system or server virtualization and give two advantages derived from using such types of virtualization. Briefly describe five components of the IT Infrastructure ecosystem required by Company X for its operations. (d)