"The correct answers" can be found by studying the lesson, learning the concepts, and then looking at the equations:
c) Add up the powers to get the total degree, and then write down the "end behavior".
d) Since they're already factored, the zeroes and their multiplicities can be copied directly from the equations.
e) Then throw it all together to slap down a graph, which you can check easily by using a grapher like a graphing calculator.