Explanation
The best thing to include in the executive summary when presenting a new service vision to an executive audience is a plan description including who needs to act and what they need to do, as this provides a clear and concise overview of the vision and its implementation. A detailed report of the data that informed the new vision or the different options explored in the process of designing this vision may not be relevant or interesting for an executive audience.

The question that the team should use to prioritize and turn insights into design opportunities is "Why is this insight valuable?" This question can help the team evaluate the relevance, significance, and impact of each insight, and how it relates to the user needs, pain points, goals, and motivations. The question also helps the team frame the insights in terms of benefits and outcomes, rather than features or solutions. The other questions may be useful for assessing feasibility or viability, but they do not prioritize insights based on value.

Explanation
The metrics that should be used to measure the success of the initiative are increase in new user activity and connected weight utilization. These metrics are aligned with the challenge statement of empowering people who are new to fitness to increase their strength, as they indicate engagement and retention of the target audience. References:
https://trailhead.salesforce.com/en/content/learn/modules/salesforce-strategy-designer-certification-prep/measure

The steps that should be taken to achieve the goal of creating vision statements using a collaborative, research-backed process are Gather, Envision, Plan. These steps involve gathering data and insights from research, envisioning possible future states based on insights, and planning how to communicate and execute the vision. References:
https://trailhead.salesforce.com/en/content/learn/modules/salesforce-strategy-designer-certification-prep/create-v

In the Design Thinking process, testing for desirability ensures that ideas meet user needs and preferences.
Refining these ideas based on feasibility takes into account the practical aspects of implementation, ensuring that the prioritized opportunities are both desirable to users and achievable by the team.