Write the output of the following program. 1 glass vehicle: 2 3 1234567 4 7 8 9 def _init__(self): self. speed = 48 def inc_speed(self): self.speed == self.speed+1 10 bus = vehicle() 11 car = vehicle() 12 train = bus 13 car.speed = 60 14 train.speed = 108 15 bus.inc_speed() 16 17 print (car.speed, train.speed, bus.speed)