Read Section 13.4 on crossflow in Chapter 13 before proceeding. We wish to strip \(\mathrm{CO}_{2}\) from a liquid solvent using air as carrier gas. Because air and \(\mathrm{CO}_{2}\) mixtures are vented and crossflow has a lower pressure drop, use a crossflow system. Inlet liquid is \(20.4 \mathrm{wt} \% \mathrm{CO}_{2}\), and total inlet liquid flow rate is 1000.0 \(\mathrm{kg} / \mathrm{h}\). Outlet liquid composition is \(2.5 \mathrm{wt} \%\) ( 0.025 weight fraction) \(\mathrm{CO}_{2}\). Gas flow to each stage is \(25,190 \mathrm{~kg}\) air/h. The air contains \(0.12 \mathrm{wt} \% \mathrm{CO}_{2}\), except that a special purified air that has no \(\mathrm{CO}_{2}\) is used in the last stage. Find the number of equilibrium stages required. In weight fraction units, equilibrium is \(\mathrm{y}=0.04 x\). Use unequal axes for your McCabe-Thiele diagram. Note: With current environmental concerns, venting \(\mathrm{CO}_{2}\) is not a good idea even if it is legal.