The purpose of this question is to do the preliminary work to make a well-labeled sketch of the graph of the function 3x f(x): - +9x+9 x+3x-28 First, find the critical values (there should be three): Two of the critical values should be associated with asymptotes of this function. The remaining critical value should be a local maximum. What is the local maximum for this graph: x= y = In addition to the vertical asymptotes, there is another asymptote. Give the equation for this asymptote: Hint: What is lim f(x)? x+100 Finally, give the range for the function f. range =