2.1a: -999.999 to 999.999
2.1b: 0.001
2.2a: 00101111
2.2b: 11100101
2.2c: 531
2.2d: 22.5
2.2e: 202.21301
2.3a: 27
2.3b: 11100101
2.3c: 1B
2.3d: 110111.1101101011
2.3e: 1E.2
2.7: 11111001
2.8: 11110000
2.9: Two's complement has one more, One's complement has a signed zero
2.10: Largest number; 15, 31. Most negative number; -16, 0. Number of distinct numbers; 32, 32.

3.1: 11101, no overflow; 111011, overflow; 0, no overflow
3.2: 
3.3: