Steven Pinker is a 48-year-old bank manager. His wife Carol, 43
years old, works part-time at a daycare. They have three children,
19-year-old Sam, 16-year-old Sarah and 14-year-old Michael. All
three children live with them. Steven's only income during the year
was $115,000 from employment, Carol earned $12,000 from the
daycare, Sam earned $10,000 from his job at Starbucks and Sarah
earned $4,000 working part-time at McDonald's. Carol's 72-year-old
mother, Ethel, also lives with the family. Ethel had an income...