What is given name for player 'aebisda01'. Calculate the average time in minutes for the all his games played as goaltender.
played as goaltender refers to pos = 'G'; time in minutes refers to Min; all his games played refers to GP; average time in minutes refers to DIVIDE(SUM(Min)/SUM(GP))
SELECT T1.nameGiven, CAST(SUM(T2.Min) AS REAL) / SUM(T2.GP) FROM Master AS T1 INNER JOIN Goalies AS T2 ON T1.playerID = T2.playerID WHERE T1.playerID = 'aebisda01' GROUP BY T1.nameGiven