The hypothetical K-machine has the following characteristics:Both instructions and data are 8-bits long. The instruction format provides 3 bits for the opcode and remaining bits are used for address. The machine consists of an accumulator (AC), program counter (PC), and an instruction register (IR). The complete list opcodes for the hypothetical K-machine are:

-000 : HALT

-001 : Load AC from memory

-010 : Store AC to memory

-011 : Load AC from I/O

-100 : Store AC to I/O

-101 : Add to AC from memory

-110 : Subtract to AC from memory

-111 : Add to AC from I/O

Show the program execution (all the steps) for the following program (assume that the program is stored starting at location 00100₂):

1.Load AC from device 10

2.Subtract contents of memory location 9

3.Store AC to memory location 9

Assume that the value retrieved from device 10 is 4 and that memory location 9 contains a value 3.