Explanation
As a Product Owner, you are accountable for maximizing the value of the product and the work of the Scrum Team. To do this, you need to collaborate with various stakeholders, user communities and other Product Owners to understand their needs, expectations and feedback, and to align them with the product vision and strategy. You also need to work with the Developers on Product Backlog refinement, which is an ongoing activity to add detail, estimates and order to Product Backlog items. This helps the Developers to understand what is valuable and feasible to deliver in the upcoming Sprints, and to plan and execute their work accordingly. These are typical and essential work for a Product Owner in a Sprint.
The other options are not typical or effective work for a Product Owner in a Sprint. Attending every Daily Scrum is not necessary, as the Daily Scrum is an event for the Developers to inspect their progress and plan their next steps. The Product Owner can attend the Daily Scrum if invited by the Developers, but should not interfere or answer questions that are not related to the Sprint Goal or the Product Backlog. Creating financial reporting upon the spent hours reported by the Developers is not a valuable activity, as it does not reflect the outcome or the value delivered by the product. It also goes against the Scrum values of trust and respect, as it implies that the Developers are not self-managing or committed to their work. Updating the work plan for the Developers on a daily basis is also not a good practice, as it undermines the autonomy and creativity of the Developers, and reduces their ability to inspect and adapt their work based on the empirical evidence. The Product Owner should not tell the Developers how to do their work, but rather focus on what is the most valuable outcome for the product.
References:
* Professional Scrum Product Owner™ II Certification
* Understanding and Applying the Scrum Framework
* Managing Products with Agility