the mystic outdoor shop mixes two types of grass seed into a blend. each type of grass has been rated (per pound) according to its shade tolerance, ability to stand up to traffic, and drought resistance, as shown in the table. type a seed costs $1 and type b seed costs $2. if the blend needs to score at least 300 points for shade tolerance, 500 points for traffic resistance, and 680 points for drought resistance, how many pounds of each seed should be in the blend? how much will the blend cost? formulate the linear programming problem that can be used to answer these questions. type a type b shade tolerance 2 2 traffic resistance 1 3 drought resistance 3 4