A growing drug abuse problem among U.S. adolescents and young adults is the increased illegal use of prescription medication. Referring to this graph, among those who reported the medications from a friend, determine the most and least used sources the friend had for these prescription medications. most: multiple doctors, least: drug dealer or stranger, most: one doctor, least: Internet, most: bought or took them from a pharmacy, least: one doctor, most: stranger, least: free from relative