3. To see how different ISA decisions will impact the machine design, consider designing an accumulator machine with the following specifications 224 words of memory [words are 32-bit wide] -Fixed format instructions A 32-bit accumulator register (AC) An index register X Index address mode: address field + X when indexing is indicated in the instruction Capable of performing a total of 128 operations A. Write the equivalent machine level language corresponding to a C statement of C- A+B B. Give an instruction format for this computer. To do this draw a diagram of the instruction format with each field clearly specified. For each field indicate its size, the reason for selected size, and a description of what purpose the field