Question: You will achieve the learning objectives mentioned above by performing the following 3 activities: Protect the application from crashing when a user inputs something other

You will achieve the learning objectives mentioned above by performing the following 3 activities:
Protect the application from crashing when a user inputs something other than a number as an answer in the process_answer of the AppCLIEngine. (LO3)
Protect the application from crashing when a user incorrectly specifies an item to be added by the process_add_item of the AppCLIEngine. (LO3)
Protect the application from crashing when a user attempts to remove an item which is not included in the existing pool of items by the process_del_item of the AppCLIEngine. (LO3)

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