Below is the graph of a polynomial function with real coefficients. All local extrema of the function are shown in the graph. use the graph to answer the following questions. 00. (2) Over which intervals is the function increasing? Choose all that apply. [(-80, -4) 0(-4,-1) 0(-1, 3) 0(3,6) 0 (-1, 6) @ (6, 00) X (b) At which r-values does the function have local maxima? If there is more than one value, separate them with commas. (c) What is the sign of the function's leading coefficient? (Choose one) Continue2 9 10 11 12 A medical equipment Industry manufactures X-ray machines. The unit cost C (the cost in dollars to make each X-ray machine) depends on the number of machines made. If x machines are made, then the unit cost is given by the function C(x) = 0.7x- -322x +56,156. What is the minimum unit cost? Do not round your answer. Unit costs X D