The sine of the angle between the straight line x−23=y−34=4−z5\frac{x - 2}{3} = \frac{y - 3}{4} = \frac{4-z}{5}3x−2=4y−3=54−z and the plane 2x−2y+z=52x - 2y + z = 52x−2y+z=5 is: