give me solution part a and part b in digtal

Design and implement a multifunction arithmetic and logic unit (ALU) based on the following specifications: 1. X and Y are the inputs of the unit and they are n-bit signed numbers represented in 2 's complement. 2. C is a 3-bit unsigned number and used to select the operation of the unit (i.e. arithmetic or logical operation). 3. O is the signed ALU output and represented in 2's complement. Note that, you are required to define the minimum number of bits needed for O that will make the overflow never occurs in this design. 4. ALU symbol and the supported functions are represented as follow: Based on the above specifications, answer the following points: a) (5 points) Specify the size of the output (O) in bits so the overflow can never occur. b) (10 points) Show the ALU implementation using medium-scale integration (MSI) components and minimum number of gates (i.e. in blocks with their sizes). Note that, you might use some kind of extension (sign- or zero-extension)