What is Functional Residual Capacity $(FRC)$?

The maximum volume of air a person can breathe in after a forced expiration is $:-$

Residual volume is

Complete the missing terms:
$(a)$ Inspiratory Capacity $(IC) = \dots \dots + IRV$
$(b)$ $\dots \dots = TV + ERV$
$(c)$ Functional Residual Capacity $(FRC) = ERV + \dots \dots$

$A$ spirometer cannot be used to measure which of the following?

What is the volume of air present in the anatomical dead space (in $, CC$)?