reading and writing

oh my goodness..
oohhh mmyyy gooodnnessss....
OH MY GOODNESS!!

I just chatted with my college friend who got band score 7.5. O.o
she told me that the band score is calculated by using the average band score of WRITING and READING.
meaning..
I need to score band score of 7 for my reading instead of 6.5.
because I know my writing will get band score of 6 at highest.
oh no..
writing and reading were the 2 parts I screwed up most during the exam.
and the average is only calculated using just 2 of those parts? >.<

so..my true aim for IELTS results.
speaking: 6
writing: 6
reading: 7
listening: 6.5
it is quite impossible to achieve this aim I know.
I hope everything will be fine on the results day. =(