Help me with this question

Rahim plans to drive from city A to station C, at the speed of 70 km per hour, to catch a train arriving

there from B. He must reach C at least 15 minutes before the arrival of the train. The train leaves B,

located 500 km south of A, at 8:00 am and travels at a speed of 50 km per hour. It is known that C

is located between west and northwest of B, with BC at 60° to AB. Also, C is located between south

and southwest of A with AC at 30° to AB. The latest time by which Rahim must leave A and still

catch the train is closest to?