A bus is parked along the side of a highway when it is passed by a truck traveling at a constant speed of 70 km/h. Two minutes later, the bus starts and accelerates until it reaches a speed of 100 km/h, which it then maintains. Knowing that 12 min after the truck passed the bus, the bus is 1.2 km ahead of the truck, determine
(a) When and where the bus passed the truck,
(b) The uniform acceleration of the bus.