Suppose a cost-benefit model is given by 6.7x y 100 -X where x is a number of percent and y is the cost, in thousands of dollars, of removing x percent of a given pollutant. Complete parts a through c. a. Find the cost of removing each percent of pollutants: 50%; 70%, 80%, 90%; 95%, 98%, 99% 50% 70% 80% 90% y 95% y 98% y 99% y = (Type an integer or decimal rounded to two decimal places as needed.) b. Is it possible, according to this function, to remove all the pollutant? No O Yes c. Graph the function. Choose the correct graph below. OA. O B. OC. O D. O O 120 20 120 0 190 -120 120