Alex and Tony started a piece of work. After working for two days, Alex left. The remaining work was completed by Tony. In how many days did Tony complete the work?
(I) Tony can complete the work in 20 days working individually.
(II) Alex and Tony can complete the work in $$6\frac{2}{3}$$ days working 3 together.

if the statement (I) alone is sufficient to answer the question, but (II) does not answer the question.

if the statement {II) alone is sufficient to answer the question but (I) does not answer the question.

if both the statements (I) and (II) are sufficient to answer the question but neither statement alone is sufficient.

if both the statements (I) and (II) together are not sufficient to answer the question and additional data is required.