Nitrogen Molecules of Mass,m = 4

Nitrogen molecules of mass,m = 4.648 * 10^-26 kg each,have a speed of 270 m/s and are incident on a double slit.The spacing between the two slits is 5.28 * 10^-9 m.A nitrogen molecule fringe pattern is observed on a screen 60.0 cm beyond the double slit.How far apart are adjacent fringes on the screen?

A) 0.40 cm
B) 0.60 cm
C) 0.70 cm
D) 0.50 cm