The first 3 figures in a pattern are shown. PART 1:Which of the following functions represents f(n), the number of small squares in figure n?

A) f(n) = 2n^2

B) f(n) = (n + 4) ^2

C) f(n) = 5n + 4

D) f(n) =n^2 + 4

PART 2:How many small squares will be in the 15th figure?

A) 60

B) 79

C) 229

D) 361