A, B and C can complete a piece of work in 4, 28 and 56 days respectively. Working together, they can complete the same work in how many days?

1
\(3\frac{4}{{17}}\)
2
\(3\frac{2}{{17}}\)
3
\(3\frac{3}{{17}}\)
4
\(3\frac{5}{{17}}\)

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