a) Let $k(x) = 3 (x + 7)(x^2-16)$. What are the zeros of $k$? The $y$-intercept? Enter the zeros in order from smallest to largest. If there are more blanks provided than you need for the zeros, enter "NONE" for the remaining ordered pairs.
Zeros: $($ , $)$, $($ , $)$, $($, $)$

$y$-intercept: $($, $)$

b) Which statements describe the long-run behavior of $k(x)$? Select all that apply.

A. $\displaystyle \lim_{x \to \infty} k(x) = -\infty$
B. $\displaystyle \lim_{x \to \infty} k(x) = \infty$
C. $\displaystyle \lim_{x \to -\infty} k(x) = -\infty$
D. $\displaystyle \lim_{x \to -\infty} k(x) = \infty$

Hint: