i want it before one hour pls

The rectangular window W(n), when (N-1=6); the output of W(n) equal to O a. W(n) ={1,1,1,1,1,1} O b. W(n) ={1,1,1,1,1,1,1} O c. W(n) ={1,1,1,1,1} O d. W(n) = {1,1,1,1,1,1,1,1}