Critically evaluate IAAS (infrastructure as a service), SaaS (software as a service) and PaaS (platform as service) models,

Critically evaluate IAAS (infrastructure as a service), SaaS (software as a service) and PaaS (platform as service) models,

Critically evaluate IAAS (infrastructure as a service), SaaS (software as a service) and PaaS (platform as service) models, and which features of the SaaS model can help to access local and remote data from various data sources. [50%] 2. Critically evaluate RDS instance and EC2 – Amazon Linux instances[30%]