Peter, Jamal and Khan were on their way to a resort. Peter drove 1/3 of the journey at a constant speed of 64 km/h. Jamal took over and drove 5/12 of the journey for 20 minutes at a constant speed of 60 km/h. Khan then took over and drove the remaining journey.
(a) How far did Jamal drive?
(b) How many minutes did Peter drive?

Source: my pal