A turbine stirring system and deflectors with six flat blades is used to homogenize a culture medium $($N $=5500$ cP$,$ p $=1250$ kg$/$m$.$ The dimensions of the turbine are: diameter of the turbine Da $=0\mathrm{.}75$ m$,$ height of the turbine: W $=15$ cm$,$ diameter of the tank Dt $=1\mathrm{.}2$ m$,$ width of the deflector J $=10$ cm$.$ If a constant agitation of $150$ rpm is required, determine the power required by the agitation system.