Light waves having two different wavelengths, 632 nm and 474 nm, pass concurrently via a single slit having width 6.87 x 10-5 m and hit a screen 1.14 m from the slit. The two diffraction patterns are made on the screen. Determine the distance (in cm) among the common center of the diffraction patterns and the first occurrence of a dark fringe from one pattern falling on the top of a dark fringe from the other pattern?