A and B can complete a job together in 12.5 days; B and C can complete the same job together in 18.75 days, while C and A can complete the same job together in 15 days. In how many days will A, B and C together be able to complete the same job alongside D, who is only 40% as efficient as C?
1
\(9 \frac{1}{3} \)
2
\(9 \frac{2}{3} \)
3
\(9 \frac{7}{27} \)
4
\(9 \frac{17}{27}\)