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Determine whether the following system represented by input output relation is stable and causal:

ะะพะบะฐะทะฐัั ะพะฟะธัะฐะฝะธะต
(VTU Model QP)
๐[๐]=๐[๐+๐]+๐[๐]+๐[๐โ๐]
๐[๐]=๐๐[๐+๐]+๐๐[๐]โ๐[๐โ๐]
๐[๐]=(โ๐.๐)^๐ ๐(๐)
๐[๐]=๐[๐+๐]+๐[๐]+๐[๐โ๐]
๐[๐]=๐๐[๐+๐]+๐๐[๐]โ๐[๐โ๐]
๐[๐]=(โ๐.๐)^๐ ๐(๐)