2. (50 Points): Consider the code fragment D = A +B+C. Let's assume that values A, B, C, and D reside in memory. We also assume that instruction operation codes (i.e., op code) are 5 bits in length, memory addresses are 32 bits, and register address are 5 bits. (2.1) (25 points]: For the accumulator machine, please implement it and what is the total code size? (2.2) (25 points]: For the register (i.e., load-store architecture) machine, please implement it and what is the total code size