X 1 4x 1 2 9 July 8, 2019 16 32 64 128 X 4x 1 2 2x 1 )= 9 1 4x 9 1 2 x 16 3x 1 2 x 1 4 4x 9 8 2 1 4x 5 ≥ 1 x 9 X 4 x 4 x 4
