Task: Question Answering
Input (English): Problem: there are 4 people of different heights standing in order of increasing height. the difference is 2 inches between the first person and the second person, and also between the second person and the third person. the difference between the third person and the fourth person is 6 inches and the average height is 78. how tall is the fourth person ?
Options: a. 82, b. 84, c. 86, d. 88, e. 90
Output (English): b