You are asked to find a set of dimensionless parameters to organize data from a laboratory experiment, in which a tank is drained through an orifice from initial liquid level \(h_{0}\). The time, \(\tau\), to drain the tank depends on tank diameter, \(D\), orifice diameter, \(d\), acceleration of gravity, \(g\), liquid density, \(ho\), and liquid viscosity, \(\mu\). How many dimensionless parameters will result? How many repeating variables must be selected to determine the dimensionless parameters? Obtain the \(\Pi\) parameter that contains the viscosity.