A 3-ft-diameter pipe is supported every 16 ft by a small frame; a typical frame is shown. Knowing that the combined weight of the pipe and its contents is 500 lb/ft and neglecting the effect of friction, determine the components (a) of the reaction at E, (b) of the force exerted at C on member CDE. -8ft- h=9ft B Fig. P6.71 r=1.5ft E 6ft D