HW Score: 17.5%, 3.5 of 20 points Part 1 of 6 O Points: 0 of 1 K The total cost and the total revenue (in dollars) for the production and sale of x ski jackets are given by C(x) =24x +21,315 and R(x) =200x -0.2xfor Os xs 1000. Find the value of x where the graph of R(x) has a horizontal tangent line. Find the profit function P(). Find the value of x where the graph of P(x) has a horizontal tangent line. Graph C(x), R(x), and P(x) on the same coordinate system for O sys 1000. Find the break-even points. Find the x-intercepts of the graph of P(x)