The courtyard villas I've seen have 3 zones. Zone 1 if for the shrub area in the front, Zone 2 is for the grass areas in the front and back, and Zone 3 is for the shrub area in the back. If your back yard has been paved, they may have disconnected part of Zone 2, which may have originally had grass that was removed. It is unlikely that a courtyard villa would have more than 3 zones.
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