Each number in the Fibonacci series is the sum of the previous two numbers.

a$)$ Write a function called fib in a high$-$level language that returns the Fibonacci number for any nonnegative value of $n.$ Hint: You probably will want to use a loop. Clearly comment your code.

b$)$ Convert the high$-$level function of part $($a$)$ into ARM assembly code. Add comments after every line of code that explain clearly what it does.

answer the question it must be with assembly.