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The number of cells in bacteria doubles every year. If the initial number of cells in bacteria is 19, then what will be the number of cells in bacteria in the second, third, fourth and fifth year?
 
 
The number of cells in bacteria in the second year is .
The number of cells in bacteria in the third year is .
The number of cells in bacteria in the fourth year is .
The number of cells in bacteria in the fifth year is .