Software Design and UML Discussion Attachment

After reviewing our final project and doing the design assignment - 

what are the main challenges you faced from decision perspective - 

Did UML help with those decisions or using UML made the project design harder? 

Please review your final project and come up with at least 1 (any model) UML diagram for the project that you can re-use  

Note; Please provide at least one UML diagram for this assignment.