A hook load of $\backslash (400,000\backslash$mathrm$\{$lbf$\}\backslash )$ is anticipated on a casing job and a safety factor based on static loading conditions of $2\mathrm{.}2$ is required. A drilling line with a $1\mathrm{.}5-$in diameter $($made of improved plow steel$)$ will be used in the hoisting system. Determine the minimum number of lines between the crown block and the traveling block that can be used.