3 men, A, B and C complete a work is such a way that A works for all the days, B works for 1st and 2nd days and C works for 3rd, 4th and 5th day. If B C can do as much work in 2 days as A alone does is 3 days. In how many
days A, B, C alone do the work if B C can complete the whole work without the help of A is 6 days.