Nathan had an infection and his doctor wanted him to take penicillin because nathan’s father and paternal grandfather were allergic to penicillin nathan had a 75% chance of having the same allergy. the doctor performed a skin test to see wether nathan would react to it the test is 98% accurate if the test predicts that nathan is not allergic to penicillin, what is the probability after the test that nathan is not allergic to thecdrug