Question 1What number should replace the question mark? Left array: 7 8 2 6 / 3 8 2 5 / 1 7 6 2 / 8 4 5 4. Right array: 8 7 1 5 / 4 7 1 6 / 2 8 5 1 / 7 3 6 ? Answer with a natural number.