2 1 2 x 4 7 8 July 8, 2019 16 32 64 128 3 1 2 x 4 7 8 1 2 x 5 4 )= 7 8 3 1 2 x 4 7 8 envelope X * - 1 2 4 * - 2 y 7 - 8 2*2 is 4 2 1/4 x 1 7/8
