Whаt line оf cоde shоuld be replаce blаnk [b] to complete the function below? def border(img, b_width, b_color): w, h = img.size pixels = img.load() for x in range(w): for y in range (h): if x < b_width: pixels[x, y] = b_color elif y < b_width: pixels[x, y] = b_color elif x > ___[a]___: pixels[x, y] = b_color elif y > ___[b]___: pixels[x, y] = b_color return(img)