just choose true or false please no need for explanintion

4 The Ratio method essentially estimates the entire project duration and cost based on the combined experience of top and/or middle managers. (4 points) ed out of s n Select one: O True O False 5 The use of several human source with relevant experience and task can improve the time and cost estimate. (4 points) d out of Select one: O True O False 16 All of the following are included in the outer ring of the project manager's network of relationships (stakeholder management), except: (4 points) d out of Select one: O a. Subcontractors O b. Government organizations c. Administrative units O d. Competitive corporations 7 While strong leadership is normally desirable, it is always required to finish a project successfully. (4 points) ed out of Select one: O True False 18 In the project management process, all of the following are usually negotiated with by project managers, except (4 points) d out of Select one: O a. Competitors O b. Functional managers c. Vendors/Suppliers O d. All of these are correct