Two slits are illuminated by a 618 nm light. The angle between the zeroth-order bright band at the center of the screen and the fourth-order bright...

Two slits are illuminated by a 618 nm light.The angle between the zeroth-order brightband at the center of the screen and thefourth-order bright band is 17.8.If the screen is 143 cm from the double-slit,how far apart is this bright band from thecentral peak?