can you please help me understand why the correct answers are correct?

1. Determine the value for the following recursive method when x-18. (3 points) f(x-6+1 if x>7 f(x)- -5 C (0 pts) -5 C (0 pts) 7 X (0pts) -2 C (0 pts) 2 C (3 pts)-3 0/3 points 2. Determine the value for the following recursive method when x-19. (3 points f(x) = if xs9 - C (0pts) 9 X (0 pts) 4 C (0 pts) -5 (0 pts)-4 (3 pts)2 0 3 points