Officially, the Instructor’s Solutions Manual for Griffiths’ text (often published by Wiley) is a restricted document. It contains step-by-step solutions to all the end-of-chapter problems, from basic Dirac delta function normalizations in Chapter 2 to full-fledged Feynman calculus calculations for quantum electrodynamics (QED) in later chapters.
6.1 The quark model predicts the existence of baryons and mesons.