Thank you for providing the details of the issue your friend is experiencing on her iPad. I found some resources to help with this.
First, the following article provides a table of what version of iOS software you need for different iCloud features. Several iCloud services are still available to use with iOS 5:
If you are having trouble with the compatible iCloud services on the iPad, I recommend the following articles:
If you need additional iCloud troubleshooting articles, they can be found here:
Thank you for using Apple Support Communities.