2. Construct the symbol table for the following LC-3 assembly language program. (10 points) 2) Assemble it into binary machine code line by line by hand. (30 points) 3) What does the program do? (10 points)

LC-3 assembly language program:

.ORIG x3000
    AND R1, R1, #0
    ADD R1, R1, #5
LOOP ST R1, NUM
    ADD R1, R1, #-1
    BRz EXIT
    BRnzp LOOP
EXIT HALT
NUM .FILL x0000
.END

Symbol table:

| Symbol | Value |
|--------|-------|
| LOOP | x3003 |
| EXIT | x3008 |
| NUM | x3009 |

Binary machine code:

.ORIG x3000
    0101000000000000   ; AND R1, R1, #0
    0001000100000101   ; ADD R1, R1, #5
LOOP
    0011000100001001   ; ST R1, NUM
    0001000100000001   ; ADD R1, R1, #-1
    0000000000000010   ; BRz EXIT
    0000000000000011   ; BRnzp LOOP
EXIT
    0000000000000101   ; HALT
NUM .FILL x0000
    .END

Explanation of the program:

This program initializes R1 to 5, and then enters a loop that stores R1's value to the memory location labeled NUM, decrements R1, and checks if R1 is zero. If R1 is not zero, the program jumps back to the beginning of the loop. When R1 reaches zero, the program exits the loop and halts. Therefore, this program stores the numbers 5, 4, 3, 2, and 1 to memory location NUM.