Resizing an ext3 partition

[Rob Myroon]

I need to increase the size of the second last partition on my hard drive and 
would like to make sure I got everything right before I mess it up completely. 
I have about 30+ GB of free unallocated space so there is lots of room to 
increase the size of the partition. (it's a 80GB hd)

I am using
Redhat 4 ES
parted-1.6.19-1.EL

Here is a partial print out of parted /dev/sda print

10     27854.921  37848.449  logical   ext3
11     37848.480  42845.229  logical   ext3

10 is 9.7 GB and 11 is 4.9 GB according to df -h.

I would like to increase partition 10 to 20 GB.

Questions

1. If I resize partition 10 by doing something like
   # parted /dev/sda resize 10 27854.921 47000
will it blow away partition 11?

2. If the answer to #1 is 'yes' would it be simpler to 
    a. backup partition 11
    b. resize partition 10 (and destroy partition 11)
    c. recreate partition 11 and copy the data back

   or

    a. move partition 11 ahead?

Thanks for the help!

Rob