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Flow over a barn (10 pts] A 50 m long storage barn is to be built with sides as per the cross-section shown in the figure below. The dimension D5 m for each panel. Wind tunnel testing is performed on a 1:100 scale model to measure the average external pressure, pon each panel pie is the internal pressure). The tunnel wind speed is 10 m/s perpendicular to the long side. The results of the experimental measurements are listed below. P - 1.05 kPa Pa 0.46 kPa Ps 0.15 kPa PL -0.40 kPa Ps 0.18 kPa Po -0.28 kPa py -0.51 kPa Boundary layer effects are negligible. Other standard assumptions apply, Calculate the drag coefficient, Op. Clearly show all steps and simplifications. The numerical answer for Cp is worth 1.pt whereas the method is worth 9pts. P4 D Ps 300 30 0201 Po 600 Pint 60° PiD P