Two Slits Are Illuminated with Red Light (λ = 650

Two slits are illuminated with red light (λ = 650 nm) . The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central maximum?

A) 0.94
B) 0.92
C) 0.96
D) 0.98
E) 0.99