:Identify the main concept of the stochastic model proposed by Sakr and Gaber.Discuss why the three-pool cloud architecture-based stochastic model proposed in Sakr and Gaber can be scalable and practical to do performance analysis on IaaS cloud computing environment.Discuss the main limitation of the three-pool cloud architecture model, and how to remove the limitation.Discuss the potential applications that can be developed based on this type of performance analysis approach.