please help me out here. please label the answers clearly.

1. Two cars are starting from positions that are 20 miles apart. They are both headed for the same intersection, as depicted in the diagram below. Car A is traveling at 30 mph, and Car B is traveling at 45 mph. Which car will reach the intersection first? intersection 18 miles Car A 20 miles Car B Part I: Use the law of cosines to determine how far Car B has to travel to reach the intersection. (4 points)Part II: Use distance = rate . time to determine the time necessary for Car A to reach the intersection. Round your answer to the nearest hundredth of an hour. (2 points) Part III: Use distance = rate . time to determine the time necessary for Car B to reach the intersection. (2 points)points) Part IV: Which car reaches the intersection first, and by how many hours? (42. Solve for the missing length and the other two angles in the triangle below. B 15.8 54 A 7.4 C Part I: Use the law of cosines to find the missing third side. (4 points)Part II: Use either the law of cosines or the law of sines to find the measure of angle C. (4 points) Part III: Use any method you like to find the measure of angle B. (2 points)3. Solve the triangle below. B 16 22 A 21 Part I: Use the law of cosines to find the measure of angle B. (4 points)Part II: Use the law of sines to find the measure of angle C. (4 points) Part III: Use any method you like to find the measure of angle A. (2 points)