James (age 63) established a trust and named his wife, Camile (age 40) an income beneficiary for 20 years. After 20 years John's son Bill (age 30) and nephew , Bob, (age 22) are to receive lifetime income interests. After the death of both Bill and Bob the remainder passes equally to Jame's granddaughter Allison (age 20) and great grandson Michael (age 1). How many skip persons are included in this taxable termination? 4, 3, 2 or 1