Reducing skin friction drag is an important way for Olympic-level cyclists to improve their performance. To develop novel cycling outfits that reduce skin friction drag, you are tasked setting up a series of scale model tests to replicate an Olympic cyclist traveling at a speed of v=12m/s(mph ). The skin friction drag coefficient x is mostly dependent on Reynolds number. cf=v22x=f(Rc) Assume that the Olympic cyclist is cycling through air at a speed of v=12m/s, with a characteristic length of L=1m. You want to create a scale model with a geometric scaling factor of 1/5, in other words, 6090%=0.3m. Your goal is to match the skin friction drag coefficient of the full sized cyclist. What fluid and flow velocity do you use? Provide mathematical justification for your choice. You will also be evaluated on the practicality of your solution, e.g., how expensive is the fluid, how hard / dangerous is it to handle, how practical it is to achieve the desired flow velocity, etc