Consider an object whose position is given by the function $p\left(t\right)=5t^2-10t$, where $p$ is in meters and $t$ is in seconds. Find the velocity and acceleration of the object at $t=4$.

Velocity: $30m/s$, Acceleration: $10m/s^2$

Velocity: $30m/s$, Acceleration: $5m/s^2$

Velocity: $10m/s$, Acceleration: $5m/s^2$

Velocity: $10m/s$, Acceleration: $10m/s^2$