Help with mechanics please

"A bus sets off from stop A and accelerates uniformly for (t1) seconds covering 300m. It then travels at a constant speed (v) for (t2) seconds covering another 1250m. It decelerates for (t3) seconds to come to rest at stop B. Given that the total time for the journey is 3 minutes and that 2(t1) = 3(t3), find (t1), (t2), (t3), (v) and the distance AB."
I know that I need to use SUVAT, but I've spent ages trying to do this question and nothing I've done has gotten me anywhere. I also don't feel like I have enough information to draw a velocity time graph..
Where do I start?