Use the polynomial function below to answer the following questions.

$\displaystyle {y}=-{3}{\left({x}+{4}\right)}{\left({2}{x}+{1}\right)}{\left({4}{x}+{3}\right)}$

a) Determine the leading term of polynomail function shown above.

L.T.$\displaystyle =$Preview Question 6 Part 1 of 2  

b) Use the leading term to identify the end behavior for the graph of the polynomial function. Select the correct choice below.