Smith and Ajit can complete a task in 12 days and 18 days, respectively. If they work together on the task for 4 days, then the fraction of the task that will be left is:

1
\(4 \over 9\)
2
\(1 \over 9\)
3
\(2 \over 9\)
4
\(5 \over 9\)

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