If a total of 84 students are enrolled in two sections of a calculus course, how many of the 84 students are female?
I. $$\frac{2}{3}$$ of the students in Section 1 are female.
II. $$\frac{1}{2}$$ of the students in Section 2 are female.

if statement I alone is sufficient, but statement II alone is not sufficient to answer the question.

if statement II alone is sufficient, but statement I alone is not sufficient to answer the question.

if both statements taken together are sufficient to answer the question, but neither statement alone is sufficient.

if statements I and II together are not sufficient, and additional. data is necded to answer the question.