11 5 x 20 July 8, 2019 16 32 64 128 11 5 x 20 9 11 5 x 200 1 5 11 x =- 207 11 5 20 x 10 11 5 8 x 20 plenum 11 4 5 x 20 210 5 x 11 )= 200 20 11 x 5 1 11 20 x 5 22 5 20 x 11 1 13 5 12 x 11 20