a$)$ What is the difference between combined AI and hybrid AI$?$

$[2$ points$]$

b$)$ Figure $1$ shows the basic structure of a neural expert system $($Negnevitsky$,2011).$ Describe the roles of neural networks and expert systems in this hybrid intelligent system.

$[3$ points$]$

c$)$ Give an example of a hybrid intelligent system that may be used in power system operation and explain how it operates.