$6.$ How fast would a person $(100$ kg$\backslash ()\backslash )$ with two $4$ ftx $8$ ft sheets of plywood $($one for each arm, each weighs $25$ kg $)$ need to run to be able to fly? Assume the plywood behaves as an airfoil with no flaps and has an angle of attack of about $\backslash (7^\{\backslash$circ$\}\backslash ).$ Assume air density to be $\backslash (1\mathrm{.}2\backslash$mathrm$\{$~kg$\}/\backslash$mathrm$\{$m$\}^\{3\}\backslash ).(5$ bonus pts$)$