Giving reasons for you answer based on the type of system being developed, suggest the most appropriate generic software process model that might be

Giving reasons for you answer based on the type of system being developed, suggest the most appropriate generic software process model that might be used as a basis for managing the development of the following systems:

         a)      A system to control hybrid car.

         b)      A virtual reality system to support software maintenance.

         c)      A university accounting system that replaces an existing system.

            d)         An interactive travel planning system that helps users plan journeys with the lowest environmental impact.