The objective function for the model is Max Z = 6.50(X1s + X2s + X3s + X4s) + 5.90(X1d + X2d + X3d + X4d) + 4.10(X1r + X2r + X3r + X4r) -2.0(X1s + X1d + X1r) - 2.75(X2s + X2d + X2r) - 2.9(X3s + X3d + X3r) - 1.7(X4s + X4d + X4r). O True O False One of the constraints for the model is X3d ≥ 0.4(X3s + X3d + X3r). O True O False One of the constraints for the model is X2r ≤ 0.3(X1r + X2r + X3r) O True O False One of the constraints for the model is X3s + X3d + X3r ≥ 140. O True O False