For the given flows and layout of departments, the center-to-center distance between any two adjacent departments equals 1 distance unit. Use rectilinear distances Department Pair Flow 1 & 2 1 & 3 1 & 4 2 & 3 10 1 6 4 2 & 4 3 & 4 1 2 a. What is the overall VDV (VDV= flow x distance) score for the arrangement? b. Generate the layout alternative with the minimum VDV.