2. Given four 4-bit registers and sufficient number of Multiplexers, give a block diagram of a system with one two n-bit input ALU. The ALU gives one output by performing a computation on any two values from the four registers.
3. Given four 4-bit registers as in problem 2 and the computation performed at ALU on any two values, give a block diagram which allows to write back the result into any of the four registers.