On forward jump and backward jump can make monkey go one step forward, then he needs 5 round which means 5 forward jumps and 5 backward jumps (10 jumps total) to the sixth step, then plus last jump to reach the 9th step.
On forward jump and backward jump can make monkey go one step forward, then he needs 5 round which means 5 forward jumps and 5 backward jumps (10 jumps total) to the sixth step, then plus last jump to reach the 9th step.