Show how the following MIPS program would be loaded into memory and executed.

# MIPS assembly code

main:

addi $sp, $sp, 4

sw $ra, 0($sp)

lw $a0, x

lw $a1, y

jal diff

lw $ra, 0($sp)

addi $sp, $sp, 4

jr $ra

diff:

sub $v0, $a0, $a1

jr $ra

Please assume that the main function starts at memory address 0x00400000, the address of variable x is 0x10000000, and the address of variable y is 0x10000004.

Please show the instruction address next to each assembly instruction.