using the decision-making grid below, calculate the total score for car a and b: car a car b criteria decision weight (w) score (sa) w x sa score (sb) w x sa price 35% 8 9 durability 10% 9 7 features 15% 10 8 warranty 15% 6 8 styling 25% 8 10 total 100% ?.?? ?.??