The probability that shop A is still trading at the end of June is 0.72.

Independently, the probability that shop B is still trading at the end of June is 0.83.

Calculate the probability that, at the end of June,

1)	both shops are still trading						to 4dp
2)	shop A is no longer trading but shop B is still trading						to 4dp
3)	both shops are no longer trading						to 4dp
4)	exactly one shop is still trading.						to 4dp