16 3 7 1 5 July 8, 2019 16 32 64 128 3 7 8 x 5 1 16 1 4 of 16 7 3 5 1 2z 7 16 3 5z 16 1 3 5 7 is the square of 16 3x 1 )/ 5 x 7 3