’ . , , , . - (): . 10 30 . , . , . , , , . . . , , . . 15 , , , , . 8 . “ .” . 10,000 50,000 . – 150 . “ ,” . 3.5 2. 64,000 . , 5ft . , , , . . , , , . 240 . , 15 . , . - , , . , . 18 180 . 250 , . , , “ . , ( ), . 140 . . , . . ,” . . - . : - - -