Dr Doreen's sister Karen got a yellow camaron for her birthday. She races up to meet with Dr Doreen. Karen starts 1000m north of OUL and travels south on 37 at a constant speed of 30 m/s. Dr Doreen (who is at OUL) jumps in her car at the same time that Karen starts. Dr Doreen travels north of 37 and meets Karen at 12 seconds later. What was Dr Doreen's acceleration?