A 2 3 1 July 8, 2019 16 32 64 128 A 2 3 1 4 A 2 3 10 A 2 3 12 A 2 3 1 6 A 2 3 1 7 A 2 3 1 5 A 2 3 11 2 a 3 )= 14 2 a 3 )= 18 A 3 2 100 A 3 2 1 8 2 a 3 13 A 3 2 1 backup strategy A 1 2 3 100 A 2 a 3 150
