A pitching machine is programmed to pitch baseballs horizontally at a speed of 134 km/h. As the machine is mounted on a truck and aimed backward, and the truck drives away from you at a speed of 85 km/h, determine:
a) The speed of the pitching machine relative to the truck.
b) The speed of the pitched ball relative to the truck.
c) The speed of the pitching machine relative to you.
d) The speed of the pitched ball relative to you.