Amir starts riding his bike up a 200 m long slope at 12 km/h, decelerating at 0.2m/s as he goes up. At the same instant, Becky starts down from the top at a speed of 6 km/h, accelerating at 0.8m/s² . How far has Amir ridden as they pass?
a) Depends on specific conditions
b) Depends on specific conditions
c) Depends on specific conditions
d) Depends on specific conditions