Final answer:
The correct characteristics for the given system are: memoryless, causal, stable, linear, and time-invariant.
Step-by-step explanation:
The correct characteristics for the given system are: a. The system is memoryless. b. The system is causal. c. The system is stable. d. The system is linear. e. The system is time-invariant.
In the context of systems theory, a system is a set of interacting or interdependent components forming an integrated whole. Characteristics of a system help define its nature, behavior, and structure.