6 9 x 36 July 8, 2019 16 32 64 128 X 9 6 5 36 6 3 9 36 x 24 96 48 9 6 x 0 36 6 4x 9 =( 1 36 x 4 6 x 3 36 9 36 x 6 9 16 threshold 6 9 x 3 6 feet 9