Eighty percent of all the apples picked on Andy's Apple Acres are satisfactory, but the other 20% are not suitable for market. Andy inspects each apple his pickers pick. Even though he has been in the apple business for 40 years, Andy is prone to make mistakes. He judges as suitable for market 5% of all unsatisfactory apples and judges as unsuitable for market 1% of all satisfactory apples.

(a) What percentage of all apples picked on Andy's Apple Acres are both satisfactory and judged to be satisfactory by Andy as being satisfactory for market?

(b) What percentage of all apples picked are marketed?

(c) What percentage of all apples that are marketed are actually satisfactory?