I'd like to perform this song in front of my church with some of the other brothers and can't figure out the riff of this song and i'm questioning the key it's in. The song is "Incredible" by Anthony Evans.

I think The first part is a Bb.
I think the 2nd chord is an Eb
What is that riff between the chords?
What key is this in and how does that riff fit into that key?


All the information you can give me would be very useful. Thanks!