A spring-loaded dart gun mounted at ground level launches a dart upward at a 45-degree angle. The dart ascends upwards to the peak of its trajectory. Neglecting air resistance, What is the initial state of the dart gun?
1) The dart gun is loaded with a spring.
2) The dart gun is mounted at ground level.
3) The dart gun launches the dart upward at a 45-degree angle.
4) The dart gun neglects air resistance.