During a test, a delivery robot of mass 24 kg accelerates towards the west at 1.25 m s−21.25\ \mathrm{m\,s^{-2}}1.25 ms−2. A resistive force of 18 N acts on the robot towards the east. What is the driving force on the robot?
12 N12\ \mathrm{N}12 N towards the west
48 N48\ \mathrm{N}48 N towards the west
37.2 N37.2\ \mathrm{N}37.2 N towards the west
30 N30\ \mathrm{N}30 N towards the west