$1)$ Explain the concept of collaborative supply chain planning. Enhance your explanation by referencing academic sources published from $2019$ to $2023,$ incorporating in$-$text citations and adhering to the APA $7$th edition referencing format. Incorporate diagrams as illustrations to enhance the explanation. The definition.$2)$ How does collaborative supply chain planning differ from distribution requirements planning? Provide evidence for the findings using academic sources published between $2019$ and $2023,$ incorporating in$-$text citations and adhering to the APA $7$th edition referencing format. Furthermore, incorporate diagrams to demonstrate additional findings of differences. $3)$ Present an example of a successful case study regarding collaborative supply chain planning, backed by scholarly sources published from $2019$ to $2023,$ incorporating in$-$text citations and formatted according to APA $7$th edition guidelines.