Two helicopters, H1 and H2, are traveling together. At time t = 0 hours, they separateand follow di?erent straight line paths given byH1 : x = 6 + 40t, y = ?3 + 10t, z = ?3 + 2tH2 : x = 6 + 110t, y = ?3 + 4t, z = ?3 + tall coordinates measured in miles. Due to system...