1. Design an 8-bit left and right shifter/rotator.
2. Show how an ALU can be used to (a) subtract 1 from a given number and (b) add 1 to a given number.
3. Design the logic extender (LE) and arithmetic extender (AE) subfunctions for an ALU that is organized as shown in Figure 6.P2 but follows the truth table of Figure 6.72a.