To do a certain task X would take 3 times as long as Y and Z together, and Z would takes 4 times as long as Y and X together. Three of them together can complete the task in 10 days. How much time is taken by X and Z to complete the task?
1
\(18 \frac{2}{9}\) days
2
\(20 \frac{1}{9}\) days
3
\(21 \frac{1}{9}\) days
4
\(22 \frac{2}{9}\) days