Exam CBAP topic 1 question 417 discussion

An organization is trying to streamline its current processes to improve performance and reduce costs. A business analyst (BA) conducted a process improvement workshop and identified the following issues as the top three items to be addressed:
1. There are multiple teams to define systems, functionality, and content. In many instances multiple teams are defining the same functionalities while other functionalities are not being defined at all, leading to unclear understanding of business requirements.
2. Product specification forms are published each year. A comparison tool is used to evaluate specification between yearly releases, but does not adequately identify changes between versions and needs to be improved.
3. Training consists of a new team member shadowing a seasoned team member. There are not written training materials for formal training sources therefore training is inconsistent and not meeting the needs of the organization.
Which stakeholders would the BA interview to determine the changes needed to the comparison tool?