can you help me answer this problem thank you

15-10 Liquid styrene at 60C is being heated in a 6-ft-diameter steam-jacketed kettle equipped with a standard six-blade turbine. (a) Calculate the film coefficient for the inside wall hj if the stirrer speed is 160r/min. (b) If a pitched-blade turbine were used with the same power input, how would the coefficient compare with that for the standard turbine