after lenovos restructuring in $2021,$ what organizational structure does the company have of the following: product division structure, geographical area structure, global matrix structure and how does this structure align with lenovos strategy $($multi$-$domestic, global or transnational$)$ and their staffing policies? by the restructuring im referring to their $3$s strategy, and is the company centralized or decentralized, and did that change with the restructuring? please go into details as to why the company has the structure that it has and especially if geographical areas are mentioned