Question 17 (6 points) A company manufactures two types of wood-burning stoves: a freestanding model and a fireplace-insert model. The cost function for producing x freestanding and y fireplace-insert stoves is C = 24ay + 175x + 210y + 1050. Find the marginal ac costs and ay when x = 90 and y = 20. Round your answers to two decimal places. O a) ac = 175. 28, ac ay 210. 28 Ox O b) ac ac 260. 91 Ox = 186. 31, dy O c) ac = 176. 26, ac ay = 212. 68 Ox O d) ac = 180. 66, ac Ox ay = 235. 46 O e) ac = 282. 33, ac ay = 437. 68 Ox