1. 4 2. X -> (1, 3, 3) 3. array([[2, 5, 8]]) 4-1. O 4-2. X -> 앞:행, 뒤:열 5. [[ 1 4] [ 9 12]] 6. 3 7. [[ 0 2 4 6] [ 8 10 12 14]] 8. array([1, 0, 0, 1, 1]) 9. X -> array([3,2,4]) array([1,1,2,2,0]) 10. O