4 is solved, I need 5 and 6.

Design a 1-bit ALU that can perform the following logic operations; AB A+B AB^- A+B^- A (+) B/A (+) B Design a 1-bit ALU that can perform the following arithmetic operations; A plus B A plus B^- A plus 1 A plus AB Extend the ALU in problems 4 and 5 to a 4-bit ALU