Derick is a 21 year old patient in your chair. He has genera…

Derick is a 21 year old patient in your chair. He has generalized plaque and inflammation. The facial of #5 has a 6 mm pocket. The distance from the gingival margin (GM) to the mucogingival junction (MGJ) is 9 mm. The clinical attachment level is 2 mm. How many mm of free gingiva does Derick have on #5F?