C语言转机器语言，求问，急

Question

Program with machine language according to the following c.
int_8 a = 1;
int_8 c = a + 3;
1）Write your assembly code & machine code
2）Explain machine code execution with the fetch-decode-execute cycle
3）Explain functions about IR, PC, ACC registers in a CPU
4）Explain physical meaning about vars a & c in a machine