Task: Question Answering
Input (English): Problem: when working alone, painter w can paint a room in 2 hours, and working alone, painter x can paint the same room in z hours. when the two painters work together and independently, they can paint the room in 3 / 4 of an hour. what is the value of z ?
Options: a. 3 / 4, b. 1 [ 1 / 5 ], c. 1 [ 2 / 5 ], d. 1 [ 3 / 4 ], e. 2
Output (English): b