How does the analogy of a car's gas pedal and brakes relate to the function of Gs and Gi proteins?

Gs proteins accelerate signal transduction like a gas pedal, while Gi proteins decelerate it like brakes.

Both Gs and Gi proteins function like brakes, slowing down signal transduction.

Gs proteins function like brakes, while Gi proteins function like a gas pedal.

Both Gs and Gi proteins function like a gas pedal, accelerating signal transduction.