how do i download iso 5 on my i pad

http://support.apple.com/kb/HT4972

ios 4 on ipad doesnt support updating by itself. i t needs to be connected to itunes:

so here i how it goes:

1)connect to itunes

2) click on ur device at the left

3)click on the summary tab

4) click on software update

5) wait for it to update