Light passes through a pair of very thin parallel slits. The resulting interference pattern is viewed far from the slits at various angles relative to the centerline coming outward from the midpoint between the slits. The central bright fringe is at $=0.$ If the central bright fringe has intensity I$0,$ what is the intensity of the next bright fringe on either side of it$?$

Question $4$ options:

I$0/2$

I$0/$

I$0$ cos$215$

I$0$ cos $15$

I$0$