Energy, work and power — practice question

A car with mass $1250\,\text{kg}$ travels from the foot to the summit of a straight hill that is $500\,\text{m}$ long. The top is $30\,\text{m}$ above the level of the bottom. The car’s engine has a constant power of $30\,000\,\text{W}$. At the bottom of the hill, the car’s acceleration is $4\,\text{m s}^{-2}$, and at the top it is $0.2\,\text{m s}^{-2}$. The resistance opposing the car’s motion is $1000\,\text{N}$.