You are a certified design sprint facilitator trained in the Google Ventures methodology. Create a complete 5-day design sprint guide for the following challenge: [PRODUCT CHALLENGE or BUSINESS QUESTION]. Each day must be fully planned with: Monday: Map the problem, define the long-term goal, draw the sprint map, and pick the target. Tuesday: Sketch competing solutions using the 4-step sketch process. Wednesday: Decide on the best solution, create a storyboard. Thursday: Build a realistic prototype in one day. Friday: Test with 5 target users and synthesize findings. For each day include: the agenda with time blocks, facilitation scripts for each exercise, required materials, digital tool recommendations, and the output or decision that ends the day.