i'm sorry RenJie, i was frustrated coz i couldn't do maths. sorry i didn't help you, sorry. you probably must have solved it by now, but in any case in future if u need help, please feel free to call me.

for the record, i finally feel that maths is irritating, after so much practice i still can't weave everything together, its like mished and mashed everywhere, ahh!

whatever.
vin