• • 5.18 Draw a two-participant PCN diagram (similar to Figure 5.12 ) for one of the following processes: a) The process of having your computer repaired. b) The process of pizza preparation. c) The process of procuring tickets for a concert. • • 5.19 Review strategic process positioning options for the regions in Figure 5.12 , discussing the operational impact (in terms of the 10 strategic OM decisions) for: a) Manufacturing the sandwiches. b) Direct interaction. c) Establishing a sandwich buffet. ••• 5.20 Select a service business that involves interaction between customers and service providers, and create a PCN dia- gram similar to Figure 5.12 . Pick a key step that could be per- formed either by the service provider or by the customers. Show process positioning options for the step. Describe how the options compare in terms of efficiency, economies of scale, and opportu- nity for customization.​