A human resources office is working to implement an increase in starting salaries for new administrative secretaries and faculty at a community college. An administrative secretary starts at $28,000 and new faculty receive $40,000. The college would like to determine the percentage increase to allocate to each group, given that the college will be hiring 8 secretaries and 7 faculty in the upcoming academic year. The college has at most $5,000 to put towards raises. What should the percentage increase be for each group, using the graphic method, given the college would like to minimize its total expenditures.