A restaurant analyzed the orders of his customers, and noticed that:  70% of the customers bought more than one order  20% of the customers asked for coffee  Of the customers who bought more than...

A restaurant analyzed the orders of his customers, and noticed that:
 70% of the customers bought more than one order
 20% of the customers asked for coffee
 Of the customers who bought more than one order, 15% asked for coffee.
a. A customer is noticed order coffee, what is the probability that he bought
only one order?
b. Find the probability of a customer bought just one order, and this order was
not coffee.
c. A customer is noticed to have a one order only, what is the probability that
he chose a coffee?
d. Find the probability of a customer bought more than one order with coffee.