Suppose you want to remove fourteen fish of an exotic species that have illegally been introduced to a lake. You have three possible removal methods. Assume that q1 , q2 , q3 are, respectively, the amount of fish removed by each method that you choose to use so that the goal will be accomplished by any combination of methods such that q1 + q2 + q3 = 14. If the marginal cost of each removal method are, respectively, $10q1 , $5q2 , and $2.5q3 , how much of each method should you use to achieve the removal cost-effectively?