An agitation system a for a flat-blade turbine with a disk and six blades has the given conditions and sizes DT1=1.83m,Da1=0.61m,W1= 0.122m,J1=0.15m,N1=90rev/min,=929kg/m3 and =0.01 Pa.s. It is desired to scale up these results for a vessel whose volume is 4 times as large. If it is designed for equal suspension solid, the width of the turbine and speed of agitator for the scaled up vessel are Select one: a. 0.193,1.175rev/s b. d 0.176m,1.06rev/s c. 0.193m,2.04rev/s d. 0.193m,1.06rev/s