Question

Unable to answer b and c with good justification for memoryless and causal.

Answer 1

Memoryless systems are those type of systems which doesn't depends on the past inputs or future inputs but the O/P signal only depends on the present input. As the name suggests these systems are called memoryless because you dont have to store past or future values to get the output signal.

Causal systems are different from memoryless systems.In causal system the output signal doesn't depend on the future input but they do depend on the present as well as past inputs.