Consider an ALU with 32-bit data input words. How many unique input combinations exist for each 1-input instruction (like pass A)? How many unique input combinations exist for each 2input instruction (like ADD)? For your ALU with three (3) 1-input and five (5) 2-input instructions, how many total input combinations exist? If you wanted to test each unique input combination for all 8 instructions using a 3GHz processor executing a new instruction each clock cycle, how long it would it take? Express your answer in seconds and then convert that to a more understandable unit of time (days, weeks, years, etc.). Considering your results, it is practical to test every possible input combination of all instructions for every microprocessor manufactured?