Samples of emissions from three suppliers are clas- sified for conformance to air-quality specifications. The re- sults from 100 samples are summarized as follows: supplier 123 2 conforms yes 22 8 25 5 30 10 Let A denote the event that a sample is from supplier 1, and let B denote the event that a sample conforms to specifications. Are events A and B independent?

(a)

(b) Determine P(BA)