. Jillian knits hats for her family and friends. In the first week, she knits 4 hats. The next week,
 she has some help, and together, they knit four times as many hats. The following week, she
 has even more help, and they knit four times as many hats as the week before. The fourth
 week, Jillian, her friends, and family, knit four times as many hats as the third week.How many
 hats will they knit in the fourth week?
 16 hats
 32 hats
 64 hats
 256 hats