Aflat-screen television is mounted on the wall of a room using bracket abc, which is fixed in position. for comfortable viewing, the television may be rotated about line ab. the force p at point d has the direction angles θx = 60°, θy = 72°, and θz = 144°. take the value of p to be 19 n. determine the moment of this force about line ab. note: for the coordinates of point d given, the top and bottom edges of the television are not parallel to the x axis.