Question : A can do a piece of work in 9 days, while B can do it in 12 days. A and B together can do the work in:

Option 1: $5\frac{1}{7}$ days

Option 2: $5\frac{2}{7}$ days

Option 3: $6\frac{1}{7}$ days

Option 4: $6\frac{2}{7}$ days

Question : A alone can do a work in 14 days. B alone can do the same work in 28 days. C alone can do the same work in 56 days. They started the work together and completed the work such that B was not working in the last 2 days and A did not work in the last 3 days. In how many days (total) was the work completed?

Option 1: $\frac{82}{7}$ days

Option 2: $\frac{79}{7}$ days

Option 3: $\frac{65}{7}$ days

Option 4: $\frac{72}{7}$ days