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Task 4: View aggregate information of social contacts	Storyboard	Learnability	Efficiency	Safety	Visibility
	The steps for this task is almost the same as the steps for task 2. The only difference is that the aggregated information is presented in the "> History" area where you can see a "frequency chart" and a "duration chart". - Frequency chart is presented in a bar chart. It indicates how many times Joe has been to a certain place. Also, it has a tab menu where Alice can choose to view Joe's weekly chart or monthly chart. - Duration chart is presented in a pie chart indicating how much time Joe spent in a certain place. Similarly, it has a tab menu which allows Alice to navigate between Joe's weekly and monthly chart.	Pros:

Task 5: Edit social contacts	Storyboard	Learnability	Efficiency	Safety	Visibility
Bob's page and his location info. The location info. Joe is sharing with Bob Permission setting of Joe for Bob	Joe enters Bob's page as in Task 2. In addition to viewing Bob's shared location with Joe, Joe can view how Bob sees his location information by clicking on the " < My LocaShare" button. Joe modifies Bob's permission by clicking on the "Edit" button at the bottom and enters the permission setting. The permission setting page is the same as the on in Task 1.

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