Can someone help me with this?

6. For each polynomial below, make a sign chart which illustrates the sign of each factor above the number line (as shown for the first interval). Below the number line, indicate the sign of the function over the interval. Then, use your sign chart to sketch the function on the coordinate plane provided. a. f (x) = (x + 3)(x2 + 1)(x-4)2 ( - ) ( + ) (- )2 ..... -3 Negative