Draw a sequence diagram showing the interactions of objects in a group diary system when a group of people are arranging a meeting. Draw a UML state diagram showing the possible state changes in...

Draw a sequence diagram showing the interactions of objects in a group diary system when a group of people are arranging a meeting. Draw a UML state diagram showing the possible state changes in either the group diary or the filling station system. When code is integrated into a larger system, problems may surface. Explain how configuration management can be useful when handling such problems.