Rock N Roll was attributed to Chuck Berry (Maybellene), but he adapted Bob Will’s tune (1938) “Ida Red”...so actually Bob Wills and the Texas Playboys invented Rock N Rock.
I don’t know about that. It’s considered traditional.
Chuck Berry borrowed a lot from a lot of different sources. He got his guitar acrobatics from T-Bone Walker, songwriting patterns from country guys like Willis, and most of his “signature” guitar licks were just adapted versions of boogie woogie licks that his sideman Johnny Johnson was playing on piano. Yet, Chuck is the one that put them all together and made the magic happen, so he is the one that is going to go down in history getting the credit.