Which contains more carbon dioxide: exhaled air or inhaled air? Why?

(N/A) $1$. Exhaled air contains more carbon dioxide than inhaled air.
$2$. During the process of cellular respiration, glucose $(C_6H_{12}O_6)$ is broken down in the presence of oxygen to produce energy, water, and carbon dioxide $(CO_2)$ as a byproduct.
$3$. This produced $CO_2$ is released from the cells into the blood and then transported to the lungs to be exhaled.