Pls show me the work! Thanks

3. A digital computer has a memory unit with 32 bits per word. The instruction set consists of 400 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory a. How many bits are needed for the opcode? b. How many bits are left for the address part of the instruction? c. What is the maximum allowable size for memory? d. What is the largest unsigned binary number that can be accommodated in one word of memory? 4. Given a 48bit CPU's designed to utilize up to 8GB of memory. a. How many bits are allocated to the memory address? (assume 1 opcode and 1 address) b. How many bits would be available for opcodes? c. How many opcodes would be possible