A woman is riding a bicycle down an \(18 \%\) slope. Her velocity is \(25 \mathrm{~km} / \mathrm{hr}\) into an oncoming \(25-\mathrm{km} / \mathrm{hr}\) wind. The air is at \(15{ }^{\circ} \mathrm{C}\) and \(101 \mathrm{kPa}\). Assuming that the only forces affecting the speed are the weight and drag, calculate the drag coefficient if the frontal area is \(0.6 \mathrm{~m}^{2}\) and the combined mass is \(54 \mathrm{~kg}\). Speculate whether the rider is in the upright or racing position.