It’s Week 3 for OU with Tulane coming to town. Miss anything from SoonerScoop during the week? Here’s a one-stop shop for a recap of the week that was from Scoop. Stories*SoonerScoop OU-Tulane predictions. The Scoop crew is still riding with the Sooners, but everybody knows this will be a real test. (Staff) *Jackson Arnold has to improve, but patience is pivotal. Look, everybody knows OU needs more from the offense. But it’s a three-game starting sample size, breathe. Arnold must respond Saturday. (George Stoia) *Third down frustration. OU has had a lot of problems in the first two weeks offen…