The second 5 minutes 2+2=4

Three. . . 4+4=8

Four. . . . 8+8= 16

Five. . . . 16+ 16=32

Six. . . . 32+32=64

Seven. . . 64+64= 128

Eight. . . 128+ 128=256

Nine. . . . 256+256=5 12

With Tenuto. 5 12+5 12= 1024

Eleven. . . 1024+ 1024=2048

Twelve. . . 2048+2048=4096

4096- 1=4095 people. Minus the first caller.