The arm bar is one of the most common attacks used in jiu-jitsu. Although this setup uses the gi, this technique is very effective without the gi as well.
As Sensei Nardu Debrah explains the technique, you should focus on the following key points:
As always, do not hyper extend your opponent's arm and quickly release the submission when your opponent taps. Safety first with all submissions.
To successfully complete this task, you must demonstrate the technique exactly as Sensei Nardu describes with your training partner in a controlled, safe environment. For bonus points, include video of yourself executing the technique during sparring / live rolling (note, this is optional and not required for you to pass this task).