A 12-person road crew is scheduled to finish repairing a highway in 6 days. On the morning of the third day, several new workers join the crew and, together, they complete the remaining repairs in 2 days. How many new workers joined the crew?

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis