Answer:
Step-by-step explanation:
Bill rolls a 1 and a head
Bill rolls a 1 and a tail
Bill rolls a 2 and a head
Bill rolls a 2 and a tail
Bill rolls a 3 and a head
Bill rolls a 3 and a tail
Bill rolls a 4 and a head
Bill rolls a 4 and a tail
Bill rolls a 5 and a head
Bill rolls a 5 and a tail
Bill rolls a 6 and a head
Bill rolls a 6 and a tail