Your task is:

• Setup Haiku in Virtual Machine (Virtual Box recommended) or on real hardware;
• Download standalone version of Haiku Mail application from the link below;
• Take familiar with the code and both problems description;
• Use make to build the application. Resulting executable binary you'll find in 'objects-...' directory;
• There are some problems in displaying and handling Read/Unread button. Awaited logic is following:
• Read button shoud be shown on e-mail with non-Read status
• Unread button should be shown on e-mail with Read status
• Pressing Read button shoud change e-mail status to Read
• Pressing Unread button should change e-mail status to Seen
• Pressing both Read and Unread buttons should move to the next e-mail;
• Fix the #4773 - no Read/Unread buttons should be shown in new (just sreated) mails.