Count Down By Steps

Write the body of count_down_by(start: int, step: int) -> None so it prints start, then start minus step, and keeps subtracting step while the value is still above 0, one number per line; nothing is printed when start is 0 or less. The driver reads the two integers, calls the function and prints Done afterwards; leave the driver alone. Input: two lines, the start then the step, no prompts.