Suppose a cost-benefit model is given by 6.4x 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%% y = 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? O Yes NO c. Graph the function. Choose the correct graph below. OC OD. OA. O B