How to find out what version of iTune and iPhoto I have?

For each application, launch it and choose About from that application's menu, or control-click its Dock icon, choose Show in Finder, control-click that, and choose Get Info.

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In your Application Folder... Right Click on the said Applications... Select Get Info Version...

If you are confused and/or unsure about what you are doing or want to do that is a very sensible idea.

Good Luck.