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Flow over a ban pts] A 50 m long storage barn is to be built with 7 sides as per the cross section shown in the figure below. The dimension D=5 m for each panel. Wind tunnel testing is performed on a 1:100 scale model to measure the average external pressure, p, on each panel (pint 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. P1 = 1.05 kPa P2 -0.46 kPa P3 - 0.15 kPa P4 -0.40 kPa Ps - -0.18 kPa P = 0.28 kPa P7 -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 9.pts. PA D Ps 30° 30 P70 PS 60° Pint 60° PiD P