At 09:00, Elif leaves home and cycles along a straight cycle path at a steady speed of 8 km/h. At 09:15, her brother Kasper leaves the same house and cycles along the same path at a steady speed of 12 km/h, chasing after Elif.
(a)How far ahead of Kasper is Elif when Kasper sets off, in km?(1)
(b)At what time does Kasper catch up with Elif?(3)
(Total for Question 25 is 4 marks)