Simple MDX : Associated Date Value for returned week number on Row Axis ?

Team , I have this MDX Below :

I'm trying to see if i can also have a Column which  Uniques the week Starting/Ending Date   as below , Thanks in advance for your help and time .

1 20040101  20040101  20040103    (null)
1 20040102  20040101  20040103      1
1 20040103  20040101  20040103     (null)
2 20040104  20040104  20040110    (null)
2 20040105  20040104  20040110       1
2 20040106  20040104  20040110       1
2 20040107  20040104  20040110     (null)
2 20040108  20040104  20040110      (null)
2 20040109  20040104  20040110      (null)
2 20040110  20040104  20040110      (null)

Rajkumar Yelugu