In Tables 5A and 5C of the NDS Supplement, why is there only one value of reference bending design stress, Fby, about the Y axis while there are two values for reference bending design stress, F+bx and F-bx, about the X axis? Group of answer choices The flexural response is different for members subjected to tension (+) or compression (-) The layup and orientation of lams are symmetric for bending about the X axis The two values for Fbx refer to Western Species and Southern Pine glulam members The layup and orientation of lams are symmetric for bending about the Y axis