A field service organization is evaluating its resource allocation strategy to optimize service delivery. They have a total of 10 technicians, each with varying skill levels across three key areas: Electrical, Plumbing, and HVAC. The organization has received 15 service requests for the week, categorized as follows: 5 requests for Electrical work, 6 for Plumbing, and 4 for HVAC. Given that each technician can handle only one request per day and that they work 5 days a week, what is the maximum number of service requests that can be fulfilled if the organization assigns technicians based on their highest skill level first?