it is known that half the visitors to a certain game resort come by bus and 80% buy a meal ia a restaurant. Three resort's tourism officer's, speculating about the probability that a visitors comes by bus a restaurant meal, suggest values of 0.2,0.4, 0.6.

1.Show that two of these values are impossible.

2.Assuming the third to be correct, what is the probability that a visitor who does not come by bus will buy a meal in a restaurant.