Hello, I need help with the following multiple choice problems 1,3 and 4. Number 2 is correct so you can ignore. Thank you very much.

1. circuits are often referred to as "memoryless" circuits because their output depend (A Sequential on their current input and no history of prior inputs is retained. B. Volatile D. Non-volatile C. Combinational 2. In general, a A. Multiplexer C. Flip-flop has n inputs and 2n outputs B. Adder D. Decoder 3. are used in digital circuits to control signal and data routing. A. B. Program counters xers C. Flip-flops5C. D. Gates 4 operation is implemented with combinational circuits only. A /A Rotate C. Division B. Multiplication D. Addition