Write SQL query to solve given problem: Which indicator name uses the Weighted average method and has the lowest value?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.IndicatorName, MIN(T1.Value) FROM Indicators AS T1 INNER JOIN Series AS T2 ON T1.IndicatorName = T2.IndicatorName WHERE T2.AggregationMethod = 'Weighted average'