Logic Problem

• Edgar, who is not Tavarez, is the coat check person's cousin.
• Bill and Tavarez once dated the coat check person.
• Bill and Ewing once dated the graphic artist.
• Tavarez gave more yellow stones than the valet, and more than Bill.
• The person who gave 22 yellow stones lives in the same building as Young and Harriett.
• Smith gave more yellow stones than the coat check person, and less than Edgar.
• Edgar, and Smith often watch fights at the graphic artist's place.
• Bill went with Tavarez to the amusement park one day. The person who was the valet. All four people are mentioned in this clue.
• The postal worker, whose first name is Bill, wasn't the person who gave 24 yellow stones.
• Fran, the person who gave 22 yellow stones, and the postal worker go shopping together on Saturdays.
• Bill, Tavarez, and Edgar were not the person who gave 15 yellow stones.
• Ewing and Harriett aren't the person who gave 15 yellow stones.
• The person who gave 22 yellow stones, Smith, and the graphic artist have known each other for years.
• The person who gave 20 yellow stones, Tavarez and Edgar all went to the 's surprise birthday party.
• Harriett, the person who gave 20 yellow stones, and the coat check person go shopping together on Saturdays.
• The postal worker isn't Harriett Tavarez.
• The graphic artist, whose first name is Harriett, wasn't the person who gave 20 yellow stones.
• The graphic artist, the person who gave 24 yellow stones, didn't want a copy of Young's book.