Develop the following systems using the anxiety pattern:

1. Panic attacks are periods of intense fear or apprehension of sudden onset accompanied by at least four or more bodily or cognitive symptoms (such as heart palpitations, dizziness, shortness of breath, or feelings of unreality) of variable duration from minutes to hours [7].

2. Dental fear (also called dental phobia, odontophobia, dentophobia, dentist phobia, and dental anxiety) is the fear of dentistry and of receiving dental care. However, it has been suggested that use of the term dental phobia should not be used for people who do not feel that their fears are excessive or unreasonable, and instead resemble individuals with post-traumatic stress disorder, caused by previous traumatic dental experiences [8].

3. Hypochondriasis, also known as hypochondria, health anxiety or illness anxiety disorder, refers to worry about having a serious illness. This debilitating condition is the result of an inaccurate perception of the condition of body or mind despite the absence of an actual medical condition [9].

a. List all the functional requirements and non-functional requirements for each area.

b. List two challenges for each area.

c. Name five context for each area.

d. Draw the application of the pattern for each context in c.

e. Select a significant use case per application and describe each one of them with text cases.

f. Map each use case in e into a sequence diagram.