$(40$ points$)$ Suppose that we want to compare the $2\text{'}$s complement integers in R$1$

and $R2,$ and save the result in $R0.$

If $R1$ is smaller than $R2,R0=-1.$

If $R1$ equals to $R2,R0=0.$

If $R1$ is larger than $R2,R0=+1.$

Based on the following flowchart to solve this problem, write the corresponding

program by using the LC$-3$ machine language. Remember to write the halt

instruction at the end of your program.