In 2006 Tom executed a valid attested will, naming his friend Bob as executor, and devising his estate as follows:

"I hereby devise all my property, both real and personal, to my wife, Wilma, but only if she survives me. In the event she does not, I leave my estate, both real and personal, in equal shares to the children of my sisters, Sally and Betty. If any child is born to Wilma and me after this date, I do not want that child to receive a share of my estate under this will."

At the time Tom executed his will, Sally had twin adult sons, Art and Clyde. Betty had one adult son, Frank. Art died in 2008 after a lengthy illness leaving one child, Linda. Sally adopted a baby daughter named Erika in 2010.

In 2014, Wilma gave birth to her and Tom's son, George. Tom and Wilma died in December 2016 in an automobile accident. They were survived by the following individuals:

• Tom's son, George;
• Tom's sister, Sally;
• Sally's son, Clyde;
• Sally's adopted daughter, Erika;
• Sally's granddaughter, Linda;
• Tom's sister, Betty;
• Betty's son, Frank:
• Wilma's brother, Jerry.

Bob filed Tom's will for probate in 2017.

1. According to the 2006 will, how should Tom's estate be distributed? Explain fully.

2. If Tom had validly revoked the 2006 will prior to death, how would Tom's estate be distributed? Explain fully.