please do all five, since these are only choose the correct answer.

1. Which of the following is wrong about RISC and CISC? (5%) A. Each instruction in RISC is simple. B. Each instruction in CISC may be simple or complex. C. CISC has a large set of instructions. D. RISC has a large set of instructions. 2. Which of the following is wrong about memory? (5%) A. 1 kB = 1024 Bytes = 8192 bits B. On a 32-bit machine, 1 word = 32 Bytes. C. On a little-endian machine, the rightmost Byte of a word is the most significant Byte. D. XOR logic is frequently used for error-correcting codes. 3. Which of the following is wrong about synchronous bus and asynchronous bus? (5%) A. There is a single master clock for a synchronous bus. B. There are two master clocks for an asynchronous bus. C. Using an asynchronous bus, bus cycles can be of any length. D. Most buses are synchronous because it's easier to build. 4. Which of the following bus has a tree topology? (5%) A. ISA B. PCI C. PCIe D. USB 5. Which of the following is wrong about bus arbitration? (5%) A. Bus arbitration must use a bus arbiter. B. Bus arbitration may be centralized or decentralized. C. There may be multiple bus request levels. D. If there're multiple requests with the same priority level, the one that is closest to the arbiter or the arbitration line wins