submitting ios app to app store gives error :ITMS-90096

this is my first ios app and when i try to submit it to the app store it gives me the ITMS-90096 error.

I think i have already uploaded all the right icons and splash screen images. It says something about the launchimage for 4-inch display on iphone-5 but i have no idea where to add it.

here is my launch image source.

i am fairly new to ios development i have a small android background and the ios process of adding and submitting apps seems quite alien to me.