Hi all,
I have the next situation:

.........[ A ]........[ B ]
[1]......H.............Q
[2]....0.001........0.16
[3]....0.002........0.38
[4]....0.003........0.42
[5]....0.004........0.63
[6]....0.005........0.77
[7]....0.006........0.95
[8]....0.007........1.11
[9]....0.008........1.27
[10]..0.009........1.43
[11]
[12]..Q=............0.68
[13]..Qmin=........?
[14]..Qmax=.......?
[15]..Hmin=........?
[16]..Hmax=.......?

where
Qmin - is the first smallest value than Q (in this case Qmin=[B5]=0.63)
Qmax - is the first highest value than Q (in this case Qmax=[B6]=0.77)
Hmin - the value attached to Qmin (in this case Hmin=[A5]=0.004)
Hmax - the value attached to Qmax (in this case Hmax=[A6]=0.005)

question:
how can i make Qmin,Qmax,Hmin,Hmax to pick up themselfs if I have a given Q=[B12] value????


please excuse my english! I really hope you'd understand my problem!

thx!