A packed column that is $3 \mathrm{ft}$ in diameter with a packing height of $25 \mathrm{ft}$ is used to absorb an impurity from a methane gas stream using an amine solution absorbent. The gas flow rate is $2000 \mathrm{scfm}$, and the liquid has a density of $1.2 \mathrm{~g} / \mathrm{cm}^{3}$ and a viscosity of $2 \mathrm{cP}$. If the column operates at $1 \mathrm{~atm}$ and $80^{\circ} \mathrm{F}$, determine the liquid flow rate at which flooding would occur in the column and the pressure drop at $50 %$ of the flooding liquid rate for the following packings:

(a) 2 in. ceramic Raschig rings

(b) 2 in. plastic Pall rings