The drag force on a submarine, which depends on velocity of the submarine, V, length of the submarine, L, fluid density, , and fluid viscosity, , is to be predicted, based on wind tunnel test data. The air in the wind tunnel, which is carefully run at conditions that will ensure similarity with the prototype, is at 25C and at one standard atmosphere pressure. The prototype, measuring 4.85 m in length, is to travel at 0.440 m/s fully submerged in water, which is a freshwater (a lake) at T = 15C. The model is a one-fifth the scale model of the prototype and a shield surrounds the drag balance strut so that the aerodynamic drag of the strut itself does not influence the measured drag i. Obtain a set of dimensionless groups that can be used to correlate experimental data. ii. Determine the required test speed in air