Suppose a cost-benefit model is given by y= 6.5x/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%.
b. is it possible, according to this function, to remove all the pollutant?
c. graph the function.