The force F (in pounds) on a person's back when he or she bends over at an angle e from an upright position is modeled by 0.6W sin(e + 90°) sin(12*) where W represents the person's weight (in pounds). (a) Simplify the model. F- (b) Use a graphing utility to graph the model, where W = 175 and 0° s e s 90°. At what angle (in degrees) is the force maximized? At what angle (in degrees) is the force minimized?

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