1. The MARIE instruction ADD NUMBER2, ___________.
   1. adds the memory value associated with NUMBER2 to the PC register
   2. adds the memory value associated with NUMBER2 to the IR register
   3. adds the memory value associated with NUMBER2 to the AC register
   4. adds the memory value associated with NUMBER2 to the MBR register

2. Consider a four-byte value. A little-endian machine stores the _______ byte at the lowest address of the 4 memory bytes.
   1. least-significant
   2. most-significant

3. Consider a four-byte value. A big-endian machine stores the _______ byte at the lowest address of the 4 memory bytes.
   1. least-significant
   2. most-significant

4. Consider the hexadecimal value 0x12345678. A little-endian machine stores the hexadecimal value____ at the lowest address of the 4 memory bytes.
   1. 12
   2. 78