In a flow of air between parallel plates spaced \(0.03 \mathrm{~m}\) apart, the centerline velocity is \(1.2 \mathrm{~m} / \mathrm{s}\) and that \(5 \mathrm{~mm}\) from the pipe wall is \(0.8 \mathrm{~m} / \mathrm{s}\). Assuming laminar flow, determine the wall shear stress using each of the measurements. Explain whether the flow is laminar or turbulent.