Determine whether the system is linear or non-linear, time invariant or time varying, causal or non-causal, memoryless or has memory?
1) (a) The system is linear, time invariant, causal, and has memory.
2) (b) The system is non-linear, time varying, non-causal, and memoryless.
3) (c) The system is linear, time varying, causal, and memoryless.
4) (d) The system is non-linear, time invariant, non-causal, and has memory.