What is the volume of dead space air in humans (in $; mL$)?

If Expiratory Reserve Volume $(ERV)$ is $1100 \text{ ml}$, Residual Volume $(RV)$ is $1200 \text{ ml}$ and Tidal Volume $(TV)$ is $500 \text{ ml}$, then what is the Functional Residual Capacity $(FRC)$ (in $\text{ ml}$)?

What is the volume of air remaining in the lungs after a forceful expiration,which is approximately $1500 \, ml$?

What is the total volume of air a person can expire after a normal inspiration?

Residual air in a rabbit is found in:

About $1200\; mL$ of air is always known to remain inside the human lungs. It is described as