Given the polynomial function: P(x)=-x^3-3x^2 13x 15 A) Graph the function on desmos.com, or another graphing utility, or by hand, if by hand, feel free to use the graph provided below. B) How many x-intercepts are there on this graph? What is the maximum number of x-intercepts for any cubic function? How do you know? C) How many "peaks and valleys," also known as the number of local minimums and maximums, does this function have? What is the maximum number of local minimums and maximums any cubic function can have? D) Describe this graph in your own words. E) What does the sign of the leading coefficient tell you about this graph