$1)$ Describe what collaborative supply chain planning is$.$ Support your explanation by citing scholarly sources published between $2019$ and $2023,$ using in$-$text citations and following the APA $7$th edition referencing style. Include illustrations in the form of diagrams to support the explanation. the definition. $2)$ How does collaborative supply chain planning differ from distribution requirements planning? Support the findings with scholarly sources between $2019$ and $2023$ with in$-$text citations and include the APA $7$th edition referencing style. Additionally, include diagrams to illustrate further findings of differences. $3)$ Provide an example of a successful case study on collaborative supply chain planning, supported by scholarly sources published between $2019$ and $2023,$ including in$-$text citations and formatted in APA $7$th edition style.