A and B can together do a piece of work in 10 days. If A works with twice of his efficiency and B works with an efficiency $\frac{1}{3}$rd less than his efficiency, then the work gets completed in 6 days. In how many days can A and B do the work alone respectively?1). $\frac{40}{3}$,402). $\frac{20}{3}$,203). 30,$\frac{20}{3}$4). $\frac{50}{3}$,25