Adding new iCloud account

So I'm in an interesting situation here. My brother and I both bought iPhone 5c's that look identical when we switched to Verizon. Well my brother started setting one up before realizing it was the phone attached to my phone number. So now my phone has his iCloud account on it.

I figured it would be easy to get rid of his account and put mine in its place, but I can't seem to figure out how. Does anyone know how to delete an iCloud account off an iPhone 5c?

 

Sorry I guess I should have mentioned I tried that. When I click on delete account though, it says it will "turn off Find My Phone."

So idk if this will delete his account or do something else, like turn off the find my phone feature.

I know I probably look pretty stupid to you all, but I am new to iPhones and smart phones in general. Just want to make sure I don't do something I will regret when deleting his account.

Thanks for any help

 

Beautiful. Thanks for the help