Use a pattern to answer the question.
one week, you tell four of your friends a secret. the next week, each of them tell four more people. so the first week, four new people know the secret; the second week, 16 new people find out the secret; the third week, 64 new people know the secret, etc.
how many people find out the secret on the 6th week?
a. 64
b. 256
c. 1,024
d. 4,096