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Exercises • Implement a Windows Store App client for http://posted.apphb.com/api/posts. It should take user input for generating a post, should be able to POST the post to the service, as well as retrieve and visualize all posts submitted in the service. Use WinJS.xhr for sending an receiving data.The app should update the posts every half minute. • Note: sometimes AppHarbor "sleeps" the service after a long time of inactivity and it takes time for the first request to work