Which of the following statements are $\text{CORRECT}$ for a controller?
- In a proportional controller, a control action is proportional to the error
- In an integral controller, a control action is proportional to the derivative of the error
- There is no “offset” in the response of the closed-loop first-order process with a proportional controller
- There is no “offset” in the response of the closed-loop first-order process with a proportional-integral controller
- $\text{P}$ and $\text{Q}$ Only
- $\text{P}$ and $\text{R}$ Only
- $\text{P}$ and $\text{S}$ Only
- $\text{Q}$ and $\text{S}$ Only